GCatholic.org


Changes in Ecclesiastical Circumscriptions

in USA

USA
DateAscendingChange
1784.11.26Apostolic Prefecture of United States of America was established (from Diocese of Québec and Apostolic Vicariate of London District)
1789.11.06Apostolic Prefecture of United States of America was promoted as Diocese of Baltimore
1793.04.25Diocese of Louisiana and the Two Floridas was established (from Diocese of La Habana)
1808.04.08Diocese of Baltimore was promoted as Metropolitan Archdiocese of Baltimore (lost territory to establish Diocese of Boston, Diocese of New York, Diocese of Philadelphia and Diocese of Bardstown)
1808.04.08Diocese of Bardstown was established (from Diocese of Baltimore)
1808.04.08Diocese of Boston was established (from Diocese of Baltimore)
1808.04.08Diocese of New York was established (from Diocese of Baltimore)
1808.04.08Diocese of Philadelphia was established (from Diocese of Baltimore)
1820.07.11Diocese of Charleston was established (from Metropolitan Archdiocese of Baltimore)
1820.07.11Diocese of Richmond was established (from Metropolitan Archdiocese of Baltimore)
1821.06.19Diocese of Cincinnati was established (from Diocese of Bardstown)
1822.08.13Apostolic Vicariate of Mississippi and Alabama was established (from Diocese of Louisiana and the Two Floridas)
1823.06.22Apostolic Vicariate of Mississippi and Alabama was suppressed (to Diocese of Louisiana and the Two Floridas)
1825.08.29Apostolic Vicariate of Alabama and the Floridas was established (from Metropolitan Archdiocese of Baltimore and Diocese of Louisiana and the Two Floridas)
1825.08.29Diocese of Louisiana and the Two Floridas was renamed as Diocese of Louisiana (lost territory to establish Apostolic Vicariate of Alabama and the Floridas)
1825.11.27Apostolic Prefecture of Sandwich Islands was established
1826.07.18Apostolic Vicariate of Mississippi was established (from Diocese of Louisiana)
1826.07.18Diocese of Louisiana was renamed as Diocese of New Orleans (lost territory to establish Diocese of Saint Louis and Apostolic Vicariate of Mississippi)
1826.07.18Diocese of Saint Louis was established (from Diocese of Durango and Diocese of Louisiana)
1829.05.15Apostolic Vicariate of Alabama and the Floridas was promoted as Diocese of Mobile
1833.03.08Diocese of Detroit was established (from Diocese of Cincinnati)
1834.05.06Diocese of Vincennes was established (from Diocese of Bardstown)
1837.07.28Diocese of Dubuque was established (from Diocese of Saint Louis)
1837.07.28Diocese of Nashville was established (from Diocese of Bardstown)
1837.07.28Apostolic Vicariate of Mississippi was promoted as Diocese of Natchez
1839Apostolic Prefecture of Texas was established (from Diocese of Linares)
1840.04.27Diocese of California was established (from Diocese of Sonora)
1841.02.13Diocese of Bardstown was suppressed (to establish Diocese of Louisville)
1841.02.13Diocese of Louisville was established (from the suppressed Diocese of Bardstown)
1841.07.10Apostolic Prefecture of Texas was promoted as Apostolic Vicariate of Texas
1843.08.11Diocese of Pittsburgh was established (from Diocese of Philadelphia)
1843.11.28Diocese of Chicago was established (from Diocese of Saint Louis)
1843.11.28Diocese of Hartford was established (from Diocese of Boston)
1843.11.28Diocese of Little Rock was established (from Diocese of Saint Louis)
1843.11.28Diocese of Milwaukee was established (from Diocese of Detroit)
1843.12.01Apostolic Vicariate of Oregon was established (from Metropolitan Archdiocese of Baltimore and Archdiocese of Québec)
1844.08.13Apostolic Prefecture of Sandwich Islands was promoted as Apostolic Vicariate of Sandwich Islands
1846.07.24Apostolic Vicariate of Oregon was promoted as Diocese of Oregon City (lost territory to establish Diocese of Vancouver Island and Diocese of Walla Walla)
1846.07.24Diocese of Walla Walla was established (from Apostolic Vicariate of Oregon)
1847.04.23Diocese of Albany was established (from Diocese of New York)
1847.04.23Diocese of Buffalo was established (from Diocese of New York)
1847.04.23Diocese of Cleveland was established (from Diocese of Cincinnati)
1847.05.04Apostolic Vicariate of Texas was promoted as Diocese of Galveston
1847.07.11Apostolic Vicariate of Sandwich Islands was renamed as Apostolic Vicariate of Hawaiian Islands
1847.07.20Diocese of Saint Louis was promoted as Metropolitan Archdiocese of Saint Louis
1849.11.20Diocese of California was suppressed (to establish Diocese of Monterey)
1849.11.20Diocese of Monterey was established (from the suppressed Diocese of California)
1850.05.31Diocese of Nesqually was established (from Diocese of Walla Walla)
1850.07.03Diocese of Savannah was established (from Diocese of Mobile and Diocese of Charleston)
1850.07.19Diocese of Cincinnati was promoted as Metropolitan Archdiocese of Cincinnati
1850.07.19Apostolic Vicariate of Indian Territory East of the Rocky Mountains was established (from Diocese of New Orleans)
1850.07.19Diocese of New Orleans was promoted as Metropolitan Archdiocese of New Orleans (lost territory to establish Apostolic Vicariate of Indian Territory East of the Rocky Mountains)
1850.07.19Diocese of New York was promoted as Metropolitan Archdiocese of New York
1850.07.19Diocese of Saint Paul was established (from Diocese of Dubuque and Diocese of Milwaukee)
1850.07.19Diocese of Wheeling was established (from Diocese of Richmond)
1850.07.23Apostolic Vicariate of New Mexico was established (from Diocese of Durango)
1850.07.29Diocese of Oregon City was promoted as Metropolitan Archdiocese of Oregon City
1851.12.21Diocese of Monterey lost territory to Metropolitan Archdiocese of México
1853.07.29Diocese of Brooklyn was established (from Metropolitan Archdiocese of New York)
1853.07.29Diocese of Burlington was established (from Diocese of Boston)
1853.07.29Diocese of Covington was established (from Diocese of Louisville)
1853.07.29Diocese of Erie was established (from Diocese of Pittsburgh)
1853.07.29Diocese of Natchitoches was established (from Metropolitan Archdiocese of New Orleans)
1853.07.29Diocese of Newark was established (from Metropolitan Archdiocese of New York and Diocese of Philadelphia)
1853.07.29Diocese of Portland in Maine was established (from Diocese of Boston)
1853.07.29Diocese of Quincy was established (from Diocese of Chicago)
1853.07.29Metropolitan Archdiocese of San Francisco was established (from Diocese of Monterey)
1853.07.29Apostolic Vicariate of New Mexico was promoted as Diocese of Santa Fe
1853.07.29Apostolic Vicariate of Upper Michigan was established (from Diocese of Detroit)
1853.07.29Diocese of Walla Walla was suppressed (to Diocese of Nesqually)
1857.01.06Apostolic Vicariate of Indian Territory East of the Rocky Mountains was renamed as Apostolic Vicariate of Kansas (lost territory to establish Apostolic Vicariate of Nebraska)
1857.01.06Apostolic Vicariate of Nebraska was established (from Apostolic Vicariate of Indian Territory East of the Rocky Mountains)
1857.01.08Diocese of Fort Wayne was established (from Diocese of Vincennes)
1857.01.09Diocese of Alton was established (from the suppressed Diocese of Quincy)
1857.01.09Apostolic Vicariate of Florida was established (from Diocese of Savannah)
1857.01.09Diocese of Quincy was suppressed (to establish Diocese of Alton)
1857.01.09Apostolic Vicariate of Upper Michigan was promoted as Diocese of Sault Sainte Marie
1858.08.15Metropolitan Archdiocese of Baltimore lost territory to Diocese of Richmond
1859.07.07Diocese of Monterey was renamed as Diocese of Monterey–Los Angeles
1860.09.27Apostolic Vicariate of Marysville was established (from Metropolitan Archdiocese of San Francisco)
1865.10.23Diocese of Sault Sainte Marie was renamed as Diocese of Sault Sainte Marie–Marquette
1868.02.05Apostolic Vicariate of Colorado and Utah was established (from Diocese of Santa Fe)
1868.03.03Diocese of Columbus was established (from Metropolitan Archdiocese of Cincinnati)
1868.03.03Diocese of Green Bay was established (from Diocese of Milwaukee)
1868.03.03Diocese of Harrisburg was established (from Diocese of Philadelphia)
1868.03.03Apostolic Vicariate of Idaho and Montana was established (from Metropolitan Archdiocese of Oregon City)
1868.03.03Diocese of La Crosse was established (from Diocese of Milwaukee)
1868.03.03Apostolic Vicariate of North Carolina was established (from Diocese of Charleston)
1868.03.03Diocese of Rochester was established (from Diocese of Buffalo)
1868.03.03Diocese of Saint Joseph was established (from Metropolitan Archdiocese of Saint Louis)
1868.03.03Diocese of Scranton was established (from Diocese of Philadelphia)
1868.03.03Diocese of Wilmington was established (from Metropolitan Archdiocese of Baltimore and Diocese of Philadelphia)
1868.03.22Apostolic Vicariate of Marysville was promoted as Diocese of Grass Valley
1868.09.25Apostolic Vicariate of Arizona was established (from Diocese of Santa Fe)
1870Apostolic Vicariate of Colorado and Utah was renamed as Apostolic Vicariate of Colorado
1870.03.11Apostolic Vicariate of Florida was promoted as Diocese of Saint Augustine
1870.06.14Diocese of Springfield in Massachusetts was established (from Diocese of Boston)
1872.02.15Diocese of Ogdensburg was established (from Diocese of Albany)
1872.02.16Diocese of Providence was established (from Diocese of Boston and Diocese of Hartford)
1874.05.28Diocese of Wilmington lost territory to Diocese of Richmond
1874.08.28Apostolic Vicariate of Brownsville was established (from Diocese of Galveston)
1874.08.28Diocese of San Antonio was established (from Diocese of Galveston)
1875.02.12Diocese of Boston was promoted as Metropolitan Archdiocese of Boston
1875.02.12Diocese of Milwaukee was promoted as Metropolitan Archdiocese of Milwaukee
1875.02.12Apostolic Vicariate of Northern Minnesota was established (from Diocese of Saint Paul)
1875.02.12Diocese of Peoria was established (from Diocese of Chicago)
1875.02.12Diocese of Philadelphia was promoted as Metropolitan Archdiocese of Philadelphia
1875.02.12Diocese of Santa Fe was promoted as Metropolitan Archdiocese of Santa Fe
1876.01.11Diocese of Allegheny was established (from Diocese of Pittsburgh)
1876.05.14Apostolic Prefecture of Indian Territory was established (from Diocese of Little Rock)
1877.05.22Apostolic Vicariate of Kansas was promoted as Diocese of Leavenworth
1879.08.12Apostolic Vicariate of Dakota was established (from Diocese of Saint Paul)
1880.09.10Diocese of Chicago was promoted as Metropolitan Archdiocese of Chicago
1880.09.10Diocese of Kansas City was established (from Metropolitan Archdiocese of Saint Louis)
1881.06.14Diocese of Davenport was established (from Diocese of Dubuque)
1881.08.02Diocese of Trenton was established (from Diocese of Newark)
1882.05.19Diocese of Grand Rapids was established (from Diocese of Detroit)
1883.03.05Apostolic Vicariate of Idaho and Montana was renamed as Apostolic Vicariate of Idaho (lost territory to establish Apostolic Vicariate of Montana)
1883.03.05Apostolic Vicariate of Montana was established (from Apostolic Vicariate of Idaho and Montana)
1884.03.07Apostolic Vicariate of Montana was promoted as Diocese of Helena
1884.04.15Diocese of Manchester was established (from Diocese of Portland in Maine)
1885.10.02Apostolic Vicariate of Nebraska was promoted as Diocese of Omaha
1886.05.28Diocese of Grass Valley was suppressed (to establish Diocese of Sacramento)
1886.05.28Diocese of Sacramento was established (from Metropolitan Archdiocese of San Francisco, and from the suppressed Diocese of Grass Valley)
1886.11.23Apostolic Vicariate of Utah was established (from Metropolitan Archdiocese of San Francisco)
1886.11.26Diocese of Syracuse was established (from Diocese of Albany)
1887.01.07Diocese of Belleville was established (from Diocese of Alton)
1887.08.02Diocese of Cheyenne was established (from Diocese of Omaha)
1887.08.02Diocese of Concordia was established (from Diocese of Leavenworth)
1887.08.02Diocese of Lincoln was established (from Diocese of Omaha)
1887.08.02Diocese of Wichita was established (from Diocese of Leavenworth)
1887.08.16Apostolic Vicariate of Colorado was promoted as Diocese of Denver
1888.05.04Diocese of Saint Paul was promoted as Metropolitan Archdiocese of Saint Paul
1889.07.01Diocese of Allegheny was suppressed (to Diocese of Pittsburgh)
1889.09.22Apostolic Vicariate of Northern Minnesota was promoted as Diocese of Saint Cloud
1889.10.03Diocese of Duluth was established (from Diocese of Saint Cloud)
1889.11.10Diocese of Jamestown was established (from Apostolic Vicariate of Dakota)
1889.11.12Apostolic Vicariate of Dakota was promoted as Diocese of Sioux Falls
1889.11.26Diocese of Winona was established (from Metropolitan Archdiocese of Saint Paul)
1890.07.15Diocese of Dallas was established (from Diocese of Galveston)
1891Apostolic Vicariate of Arizona lost territory to Diocese of Dallas
1891.01.27Apostolic Vicariate of Utah was promoted as Diocese of Salt Lake
1891.05.29Apostolic Prefecture of Indian Territory was promoted as Apostolic Vicariate of Indian Territory
1891.05.29Diocese of Leavenworth was renamed as Diocese of Kansas City, Kansas
1893.06.15Diocese of Dubuque was promoted as Metropolitan Archdiocese of Dubuque
1893.08.25Apostolic Vicariate of Idaho was promoted as Diocese of Boise City
1894.07.27Apostolic Prefecture of Alaska was established (from Diocese of New Westminster and Diocese of Vancouver Island)
1897.03.05Diocese of Kansas City, Kansas was renamed as Diocese of Leavenworth
1897.04.06Diocese of Fargo was established (from the suppressed Diocese of Jamestown)
1897.04.06Diocese of Jamestown was suppressed (to establish Diocese of Fargo)
1897.05.08Apostolic Vicariate of Arizona was promoted as Diocese of Tucson
1898.03.28Diocese of Indianapolis was established (from the suppressed Diocese of Vincennes)
1898.03.28Diocese of Vincennes was suppressed (to establish Diocese of Indianapolis)
1901.05.30Diocese of Altoona was established (from Diocese of Harrisburg and Diocese of Pittsburgh)
1902.01.15Diocese of Sioux City was established (from Metropolitan Archdiocese of Dubuque)
1902.08.04Diocese of Lead was established (from Diocese of Sioux Falls)
1903.06.19Diocese of Baker City was established (from Metropolitan Archdiocese of Oregon City)
1904.03.12Diocese of Fall River was established (from Diocese of Providence)
1904.05.18Diocese of Great Falls was established (from Diocese of Helena)
1905.05.03Diocese of Superior was established (from Diocese of Green Bay and Diocese of La Crosse)
1905.08.23Apostolic Vicariate of Indian Territory was promoted as Diocese of Oklahoma
1907.09.11Diocese of Nesqually was suppressed (to establish Diocese of Seattle)
1907.09.11Diocese of Seattle was established (from the suppressed Diocese of Nesqually)
1908.09.23Diocese of Rockford was established (from Metropolitan Archdiocese of Chicago)
1909.12.31Diocese of Bismarck was established (from Diocese of Fargo)
1909.12.31Diocese of Crookston was established (from Metropolitan Archdiocese of Saint Paul)
1910.04.15Diocese of Toledo was established (from Diocese of Cleveland)
1910.06.08Abbacy nullius of Belmont–Mary Help of Christians was established (from Apostolic Vicariate of North Carolina)
1910.08.06Diocese of Alexandria was established (from the suppressed Diocese of Natchitoches)
1910.08.06Diocese of Natchitoches was suppressed (to establish Diocese of Alexandria)
1911.08.12Diocese of Des Moines was established (from Diocese of Davenport)
1912.03.08Diocese of Kearney was established (from Diocese of Omaha)
1912.03.23Apostolic Vicariate of Brownsville was suppressed (to establish Diocese of Corpus Christi)
1912.03.23Diocese of Corpus Christi was established (from the suppressed Apostolic Vicariate of Brownsville)
1913.05.28Ordinariate of United States of America (Ukrainian Rite) was established
1913.12.17Diocese of Spokane was established (from Diocese of Seattle)
1914.03.03Diocese of El Paso was established (from Diocese of San Antonio, Diocese of Dallas and Diocese of Tucson)
1917.02.15Apostolic Prefecture of Alaska was promoted as Apostolic Vicariate of Alaska
1917.04.11Diocese of Grand Island was established (from the suppressed Diocese of Kearney)
1917.04.11Diocese of Kearney was suppressed (to establish Diocese of Grand Island)
1918.01.11Diocese of Lafayette in Louisiana was established (from Metropolitan Archdiocese of New Orleans)
1922.06.01Diocese of Los Angeles–San Diego was established (from Diocese of Monterey–Los Angeles)
1922.06.01Diocese of Monterey–Los Angeles was renamed as Diocese of Monterey–Fresno (lost territory to establish Diocese of Los Angeles–San Diego)
1923.10.26Diocese of Alton was suppressed (to establish Diocese of Springfield in Illinois)
1923.10.26Diocese of Springfield in Illinois was established (from the suppressed Diocese of Alton)
1924.05.08Apostolic Exarchate of United States of America (Ruthenian Rite) was established (from Ordinariate of United States of America)
1924.05.08Ordinariate of United States of America (Ukrainian Rite) was promoted as Apostolic Exarchate of United States of America (lost territory to establish Apostolic Exarchate of United States of America)
1924.12.12Apostolic Vicariate of North Carolina was promoted as Diocese of Raleigh
1926.08.03Diocese of Amarillo was established (from Diocese of San Antonio and Diocese of Dallas)
1926.08.03Diocese of San Antonio was promoted as Metropolitan Archdiocese of San Antonio (lost territory to establish Diocese of Amarillo)
1928.09.26Metropolitan Archdiocese of Oregon City was suppressed (to establish Metropolitan Archdiocese of Portland in Oregon)
1928.09.26Metropolitan Archdiocese of Portland in Oregon was established (from the suppressed Metropolitan Archdiocese of Oregon City)
1930.08.01Diocese of Lead was suppressed (to establish Diocese of Rapid City)
1930.08.01Diocese of Rapid City was established (from the suppressed Diocese of Lead)
1930.11.14Diocese of Oklahoma was renamed as Diocese of Oklahoma City–Tulsa
1931.03.27Diocese of Reno was established (from Diocese of Sacramento and Diocese of Salt Lake)
1936.07.11Diocese of Los Angeles–San Diego was promoted as Metropolitan Archdiocese of Los Angeles (lost territory to establish Diocese of San Diego)
1936.07.11Diocese of San Diego was established (from Diocese of Los Angeles–San Diego)
1937.01.03Diocese of Marquette was established (from the suppressed Diocese of Sault Sainte Marie–Marquette)
1937.01.03Diocese of Sault Sainte Marie–Marquette was suppressed (to establish Diocese of Marquette)
1937.01.05Diocese of Savannah was renamed as Diocese of Savannah–Atlanta
1937.05.22Diocese of Detroit was promoted as Metropolitan Archdiocese of Detroit (lost territory to establish Diocese of Lansing)
1937.05.22Diocese of Lansing was established (from Diocese of Detroit)
1937.12.09Diocese of Camden was established (from Diocese of Trenton)
1937.12.09Diocese of Owensboro was established (from Diocese of Louisville)
1937.12.09Diocese of Paterson was established (from Diocese of Newark)
1937.12.10Diocese of Louisville was promoted as Metropolitan Archdiocese of Louisville
1937.12.10Diocese of Newark was promoted as Metropolitan Archdiocese of Newark
1938.02.26Diocese of Saginaw was established (from Metropolitan Archdiocese of Detroit and Diocese of Grand Rapids)
1939.07.22Metropolitan Archdiocese of Baltimore was renamed as Metropolitan Archdiocese of Baltimore–Washington
1939.12.16Diocese of Gallup was established (from Metropolitan Archdiocese of Santa Fe and Diocese of Tucson)
1941.01.25Apostolic Vicariate of Hawaiian Islands was promoted as Diocese of Honolulu
1941.11.15Diocese of Denver was promoted as Metropolitan Archdiocese of Denver (lost territory to establish Diocese of Pueblo)
1941.11.15Diocese of Pueblo was established (from Diocese of Denver)
1943.05.15Diocese of Youngstown was established (from Diocese of Cleveland)
1944.04.17Abbacy nullius of Belmont–Mary Help of Christians lost territory to Diocese of Raleigh
1944.10.21Diocese of Evansville was established (from Diocese of Indianapolis)
1944.10.21Diocese of Indianapolis was promoted as Metropolitan Archdiocese of Indianapolis (lost territory to establish Diocese of Evansville)
1944.10.21Diocese of Lafayette in Indiana was established (from Diocese of Fort Wayne)
1944.10.21Diocese of Steubenville was established (from Diocese of Columbus)
1944.12.23Diocese of Concordia was suppressed (to establish Diocese of Salina)
1944.12.23Diocese of Salina was established (from the suppressed Diocese of Concordia)
1945.08.04Diocese of Omaha was promoted as Metropolitan Archdiocese of Omaha
1945.12.22Diocese of Madison was established (from Metropolitan Archdiocese of Milwaukee, Diocese of Green Bay and Diocese of La Crosse)
1947.05.10Diocese of Kansas City was established (from the suppressed Diocese of Leavenworth)
1947.05.10Diocese of Leavenworth was suppressed (to establish Diocese of Kansas City)
1947.11.15Diocese of Austin was established (from Diocese of Galveston, Metropolitan Archdiocese of San Antonio and Diocese of Dallas)
1947.11.15Metropolitan Archdiocese of Baltimore–Washington was renamed as Metropolitan Archdiocese of Baltimore (lost territory to establish Archdiocese of Washington)
1947.11.15Archdiocese of Washington was established (from Metropolitan Archdiocese of Baltimore–Washington)
1948.12.11Diocese of Joliet was established (from Metropolitan Archdiocese of Chicago, Diocese of Peoria and Diocese of Rockford)
1950.01.14Diocese of Worcester was established (from Diocese of Springfield in Massachusetts)
1951.03.10Diocese of Greensburg was established (from Diocese of Pittsburgh)
1951.03.31Diocese of Salt Lake was renamed as Diocese of Salt Lake City
1951.05.19Diocese of Dodge City was established (from Diocese of Wichita)
1951.06.23Diocese of Juneau was established (from Apostolic Vicariate of Alaska)
1951.06.23Diocese of Seattle was promoted as Metropolitan Archdiocese of Seattle (lost territory to establish Diocese of Yakima)
1951.06.23Diocese of Yakima was established (from Diocese of Seattle and Diocese of Spokane)
1952.02.16Diocese of Baker City was renamed as Diocese of Baker
1952.08.09Diocese of Kansas City was promoted as Metropolitan Archdiocese of Kansas City
1953.08.06Diocese of Bridgeport was established (from Diocese of Hartford)
1953.08.06Diocese of Hartford was promoted as Metropolitan Archdiocese of Hartford (lost territory to establish Diocese of Bridgeport and Diocese of Norwich)
1953.08.06Diocese of Norwich was established (from Diocese of Hartford)
1953.10.20Diocese of Dallas was renamed as Diocese of Dallas–Fort Worth
1954.04.30Diocese of Mobile was renamed as Diocese of Mobile–Birmingham
1956.07.02Diocese of Atlanta was established (from Diocese of Savannah–Atlanta)
1956.07.02Diocese of Jefferson City was established (from Metropolitan Archdiocese of Saint Louis and Diocese of Kansas City, and from the suppressed Diocese of Saint Joseph)
1956.07.02Diocese of Kansas City was renamed as Diocese of Kansas City–Saint Joseph (gained territory from the suppressed Diocese of Saint Joseph, and lost territory to establish Diocese of Jefferson City and Diocese of Springfield–Cape Girardeau)
1956.07.02Diocese of Saint Joseph was suppressed (to Diocese of Kansas City–Saint Joseph, and to establish Diocese of Jefferson City and Diocese of Springfield–Cape Girardeau)
1956.07.02Diocese of Savannah–Atlanta was renamed as Diocese of Savannah (lost territory to establish Diocese of Atlanta)
1956.07.02Diocese of Springfield–Cape Girardeau was established (from Metropolitan Archdiocese of Saint Louis and Diocese of Kansas City, and from the suppressed Diocese of Saint Joseph)
1956.07.20Apostolic Exarchate of Stamford (Ukrainian Rite) was established (from Apostolic Exarchate of United States of America)
1956.12.10Diocese of Gary was established (from Diocese of Fort Wayne)
1956.12.18Diocese of Natchez was renamed as Diocese of Natchez–Jackson
1957.04.06Diocese of Rockville Centre was established (from Diocese of Brooklyn)
1957.09.08Military Vicariate of United States of America was established
1957.10.09Diocese of Altoona was renamed as Diocese of Altoona–Johnstown
1957.11.18Diocese of New Ulm was established (from Metropolitan Archdiocese of Saint Paul)
1958.05.25Diocese of Miami was established (from Diocese of Saint Augustine)
1958.07.10Apostolic Exarchate of United States of America (Ukrainian Rite) was promoted as Metropolitan Archdiocese of Philadelphia
1958.07.10Apostolic Exarchate of Stamford (Ukrainian Rite) was promoted as Diocese of Stamford
1959.07.25Diocese of Galveston was renamed as Diocese of Galveston–Houston
1960.03.26Abbacy nullius of Belmont–Mary Help of Christians lost territory to Diocese of Raleigh
1960.05.28Diocese of Fort Wayne was renamed as Diocese of Fort Wayne–South Bend
1961.01.28Diocese of Allentown was established (from Metropolitan Archdiocese of Philadelphia)
1961.07.14Diocese of Saint Nicholas of Chicago (Ukrainian Rite) was established (from Metropolitan Archdiocese of Philadelphia)
1961.07.22Diocese of Baton Rouge was established (from Metropolitan Archdiocese of New Orleans)
1961.10.16Diocese of San Angelo was established (from Diocese of Amarillo, Diocese of Austin and Diocese of Dallas–Fort Worth)
1962.01.13Diocese of Oakland was established (from Metropolitan Archdiocese of San Francisco)
1962.01.13Diocese of Santa Rosa was established (from Metropolitan Archdiocese of San Francisco and Diocese of Sacramento)
1962.01.13Diocese of Stockton was established (from Metropolitan Archdiocese of San Francisco and Diocese of Sacramento)
1962.02.10Diocese of Atlanta was promoted as Metropolitan Archdiocese of Atlanta
1962.08.08Apostolic Vicariate of Alaska was promoted as Diocese of Fairbanks
1963.07.06Diocese of Passaic (Ruthenian Rite) was established (from Apostolic Exarchate of United States of America)
1963.07.06Apostolic Exarchate of United States of America (Ruthenian Rite) was promoted as Diocese of Pittsburgh (lost territory to establish Diocese of Passaic)
1965.07.10Diocese of Brownsville was restored (from Diocese of Corpus Christi)
1965.10.12Archdiocese of Washington was promoted as Metropolitan Archdiocese of Washington
1966.01.10Apostolic Exarchate of United States of America (Maronite Rite) was established
1966.01.10Apostolic Exarchate of United States of America (Greek-Melkite Rite) was established
1966.01.22Metropolitan Archdiocese of Anchorage was established (from Diocese of Juneau)
1966.06.25Diocese of Beaumont was established (from Diocese of Galveston–Houston)
1966.07.11Metropolitan Archdiocese of Saint Paul was renamed as Metropolitan Archdiocese of Saint Paul and Minneapolis
1966.09.15Diocese of Sacramento lost territory to Diocese of Stockton
1967.10.06Diocese of Fresno was established (from Diocese of Monterey–Fresno)
1967.10.06Diocese of Monterey–Fresno was renamed as Diocese of Monterey (lost territory to establish Diocese of Fresno)
1968.03.02Diocese of Miami was promoted as Metropolitan Archdiocese of Miami (lost territory to establish Diocese of Orlando and Diocese of Saint Petersburg)
1968.03.02Diocese of Orlando was established (from Diocese of Miami and Diocese of Saint Augustine)
1968.03.02Diocese of Saint Petersburg was established (from Diocese of Miami and Diocese of Saint Augustine)
1969.02.21Diocese of Pittsburgh (Ruthenian Rite) was promoted as Metropolitanate sui juris of Munhall (lost territory to establish Diocese of Parma)
1969.02.21Diocese of Parma (Ruthenian Rite) was established (from Diocese of Pittsburgh)
1969.06.28Diocese of Birmingham was established (from Diocese of Mobile–Birmingham)
1969.06.28Diocese of Mobile–Birmingham was renamed as Diocese of Mobile (lost territory to establish Diocese of Birmingham)
1969.06.28Diocese of Phoenix was established (from Diocese of Tucson)
1969.08.09Diocese of Dallas–Fort Worth was renamed as Diocese of Dallas (lost territory to establish Diocese of Fort Worth)
1969.08.09Diocese of Fort Worth was established (from Diocese of Dallas–Fort Worth)
1970.06.20Diocese of Memphis was established (from Diocese of Nashville)
1970.12.19Diocese of Gaylord was established (from Diocese of Grand Rapids and Diocese of Saginaw)
1970.12.19Diocese of Kalamazoo was established (from Diocese of Grand Rapids and Diocese of Lansing)
1971Titular Episcopal See of Allegheny was restored
1971Titular Episcopal See of Walla Walla was restored
1971.11.12Diocese of Charlotte was established (from Diocese of Raleigh)
1971.11.29Apostolic Exarchate of United States of America (Maronite Rite) was promoted as Diocese of Saint Maron of Detroit
1972.12.13Diocese of Oklahoma City–Tulsa was promoted as Metropolitan Archdiocese of Oklahoma City (lost territory to establish Diocese of Tulsa)
1972.12.13Diocese of Tulsa was established (from Diocese of Oklahoma City–Tulsa)
1974.05.28Diocese of Arlington was established (from Metropolitan Archdiocese of Washington and Diocese of Richmond)
1974.08.21Diocese of Wheeling was renamed as Diocese of Wheeling–Charleston
1975.10.01Diocese of Pensacola–Tallahassee was established (from Diocese of Mobile and Diocese of Saint Augustine)
1976.03.24Diocese of Orange was established (from Metropolitan Archdiocese of Los Angeles)
1976.06.28Apostolic Exarchate of United States of America (Greek-Melkite Rite) was promoted as Diocese of Newton
1976.10.13Diocese of Reno was renamed as Diocese of Reno–Las Vegas
1976.10.18Diocese of Alexandria was renamed as Diocese of Alexandria–Shreveport
1977.01.01Abbacy nullius of Belmont–Mary Help of Christians was suppressed (to Diocese of Charlotte)
1977.03.01Diocese of Biloxi was established (from the suppressed Diocese of Natchez–Jackson)
1977.03.01Diocese of Jackson was established (from the suppressed Diocese of Natchez–Jackson)
1977.03.01Diocese of Natchez–Jackson was suppressed (to establish Diocese of Biloxi and Diocese of Jackson)
1977.03.02Diocese of Houma–Thibodaux was established (from Metropolitan Archdiocese of New Orleans)
1977.03.11Metropolitanate sui juris of Munhall (Ruthenian Rite) was renamed as Metropolitanate sui juris of Pittsburgh
1977.06.27Diocese of Saint Maron of Detroit (Maronite Rite) was renamed as Diocese of Saint Maron of Brooklyn
1978.07.14Diocese of San Bernardino was established (from Diocese of San Diego)
1980.01.29Diocese of Lake Charles was established (from Diocese of Lafayette in Louisiana)
1980.02.14Diocese of Great Falls was renamed as Diocese of Great Falls–Billings
1980.07.29Diocese of Mobile was promoted as Metropolitan Archdiocese of Mobile
1981.01.27Diocese of San Jose was established (from Metropolitan Archdiocese of San Francisco)
1981.07.03Apostolic Exarchate of United States of America and Canada (Armenian Rite) was established
1981.11.19Diocese of Metuchen was established (from Diocese of Trenton)
1981.12.03Diocese of Van Nuys (Ruthenian Rite) was established (from Diocese of Parma)
1982.01.11Apostolic Exarchate of United States of America (Chaldean Rite) was established
1982.01.11Apostolic Exarchate of United States of America (Romanian Rite) was established
1982.04.13Diocese of Victoria was established (from Diocese of Galveston–Houston, Metropolitan Archdiocese of San Antonio and Diocese of Corpus Christi)
1982.08.17Diocese of Las Cruces was established (from Metropolitan Archdiocese of Santa Fe and Diocese of El Paso)
1983.03.25Diocese of Lubbock was established (from Diocese of Amarillo and Diocese of San Angelo)
1983.11.10Diocese of Colorado Springs was established (from Metropolitan Archdiocese of Denver and Diocese of Pueblo)
1983.12.05Diocese of Saint Josaphat in Parma (Ukrainian Rite) was established (from Metropolitan Archdiocese of Philadelphia)
1984.06.16Diocese of Palm Beach was established (from Metropolitan Archdiocese of Miami and Diocese of Orlando)
1984.06.16Diocese of Venice was established (from Metropolitan Archdiocese of Miami, Diocese of Orlando and Diocese of Saint Petersburg)
1985.08.03Apostolic Exarchate of United States of America (Chaldean Rite) was promoted as Diocese of Saint Thomas the Apostle of Detroit
1986.06.16Diocese of Alexandria–Shreveport was renamed as Diocese of Alexandria (lost territory to establish Diocese of Shreveport)
1986.06.16Diocese of Shreveport was established (from Diocese of Alexandria–Shreveport)
1986.07.21Military Vicariate of United States of America was promoted as Military Ordinariate of Archdiocese for the Military Services of the United States
1986.12.12Diocese of Tyler was established (from Diocese of Galveston–Houston, Diocese of Beaumont and Diocese of Dallas)
1987.03.26Apostolic Exarchate of United States of America (Romanian Rite) was promoted as Diocese of Saint George’s in Canton
1988.01.14Diocese of Lexington was established (from Metropolitan Archdiocese of Louisville and Diocese of Covington)
1988.05.27Diocese of Knoxville was established (from Diocese of Nashville)
1994.02.19Diocese of Our Lady of Lebanon of Los Angeles (Maronite Rite) was established (from Diocese of Saint Maron of Brooklyn)
1995Titular Episcopal See of Alton was restored
1995Titular Episcopal See of Bardstown was restored
1995Titular Episcopal See of Concordia was restored
1995Titular Episcopal See of Grass Valley was restored
1995Titular Episcopal See of Jamestown was restored
1995Titular Episcopal See of Kearney was restored
1995Titular Episcopal See of Lead was restored
1995Titular Episcopal See of Leavenworth was restored
1995Titular Episcopal See of Natchitoches was restored
1995Titular Episcopal See of Nesqually was restored
1995Titular Episcopal See of Quincy was restored
1995Titular Episcopal See of Sault Sainte Marie was restored
1995Titular Episcopal See of Vincennes was restored
1995.03.21Diocese of Las Vegas was established (from Diocese of Reno–Las Vegas)
1995.03.21Diocese of Reno–Las Vegas was renamed as Diocese of Reno (lost territory to establish Diocese of Las Vegas)
1995.11.06Diocese of Our Lady of Deliverance of Newark (Syriac Rite) was established
1996Titular Episcopal See of California was restored
1996Titular Metropolitan See of Oregon City was restored
1996Titular Episcopal See of Sault Sainte Marie was renamed as Titular Episcopal See of Sault Sainte Marie in Michigan
2000.07.03Diocese of Laredo was established (from Metropolitan Archdiocese of San Antonio and Diocese of Corpus Christi)
2001.02.16Diocese of Saint Thomas the Apostle of Chicago (Syro-Malabar Rite) was established
2002.05.21Diocese of Saint Peter the Apostle of San Diego (Chaldean Rite) was established (from Diocese of Saint Thomas the Apostle of Detroit)
2004.12.29Diocese of Galveston–Houston was promoted as Metropolitan Archdiocese of Galveston–Houston
2005.09.12Apostolic Exarchate of United States of America and Canada (Armenian Rite) was promoted as Diocese of Our Lady of Nareg in New York
2009.12.18Diocese of Van Nuys (Ruthenian Rite) was renamed as Diocese of Holy Protection of Mary of Phoenix
2010.07.14Apostolic Exarchate of United States of America (Syro-Malankar Rite) was established
2012.01.01Personal Ordinariate of The Chair of Saint Peter (Anglican Rite) was established
2014.12.29Diocese of Our Lady of Nareg in New York (Armenian Rite) was renamed as Diocese of Our Lady of Nareg in Glendale
2016.01.04Apostolic Exarchate of United States of America (Syro-Malankar Rite) was promoted as Diocese of Saint Mary, Queen of Peace, of the United States of America and Canada

as of 2017.12.13

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