| Date | Event | From | To |
|---|
| Prefecture Apostolic of Texas |
| 1839 | Erected | Diocese of Linares o Nueva León
| Prefecture Apostolic of Texas (erected)
|
| Vicariate Apostolic of Texas |
| 10 July 1841 | Erected | Prefecture Apostolic of Texas
| Vicariate Apostolic of Texas (erected)
|
| Diocese of Galveston |
| 4 May 1847 | Erected | Vicariate Apostolic of Texas
| Diocese of Galveston (erected) (Name changed and Vicariate raised to a Diocese)
|
| 19 July 1850 | Metropolitan Changed | | Diocese of Galveston (from Baltimore to New Orleans)
Diocese of Little Rock (from Baltimore to New Orleans)
Diocese of Mobile (from Baltimore to New Orleans)
Diocese of Natchez (from Baltimore to New Orleans)
|
| 28 August 1874 | Territory Lost | Diocese of Galveston
| Vicariate Apostolic of Brownsville (erected) (From the Nueces River to the Rio Grande River)
Diocese of San Antonio (erected) (From the Colorado River to the Nunes River)
|
| 15 July 1890 | Territory Lost | Diocese of Galveston
| Diocese of Dallas (erected)
|
| 3 August 1926 | Metropolitan Changed | | Diocese of Galveston (from New Orleans)
|
| 15 November 1947 | Territory Lost | Diocese of Dallas (Coleman, Brown, Mills, and Hamilton)
Diocese of Galveston (Lampasas, Coryeli, McLenan, Limestone, Bell, Falls, Robertson, Williamson, Milam, Brazos, Lee, Burleson, Washington, Austin along with parts of Burnet, Colorado, Fayette, Bastrop, and Travis)
Archdiocese of San Antonio (McCulloch, St. Saba, Mason, Llano, Blanco, Rays, and Caldwell along with parts of Burnet, Trams, and Bastrop)
| Diocese of Austin (erected)
|
| Diocese of Galveston-Houston |
| 25 July 1959 | Name Changed | Diocese of Galveston
| Diocese of Galveston-Houston
|
| 25 June 1966 | Territory Lost | Diocese of Galveston-Houston (Counties of : Angelina Cherokee, Hardin, Jasper, Jefferson, Nacogdokes, Newton, Orange, Polk, Sabine, San Augustine, Shelby, Tyler, and parts of Chambers and Liberty, and the bays of Trinity Bay and Galveston Bay)
| Diocese of Beaumont (erected)
|
| 13 April 1982 | Territory Lost | Diocese of Corpus Christi (Goliad County)
Diocese of Galveston-Houston (Parts of Matagorda and Wharton Counties)
Archdiocese of San Antonio (Calhoun, DeWitt, Jackson, Lavaca, and Victoria Counties and parts of Colorado, Fayette, Matagorda, and Wharton Counties)
| Diocese of Victoria in Texas (erected)
|
| 12 December 1986 | Territory Lost | Diocese of Beaumont (Angelina, Cherokee, Nacogdoches, Sabine, San Augustine, and Shelby)
Diocese of Dallas (Bowie, Camp, Gass, Delta, Franklin, Gregg, Harrison, Henderson, Hopkins. Iamar, Marion, Morris, Panola, Rains, Red River, Rusk, Smith, Titus, Upshur, Van Zandt, and Wood)
Diocese of Galveston-Houston (Anderson, Freestone, Houston, Leon, and Trinity)
| Diocese of Tyler (erected)
|
| 25 January 1999 | Territory Lost | Diocese of Galveston-Houston (Madison county)
| Diocese of Tyler
|
| Archdiocese of Galveston-Houston |
| 29 December 2004 | Elevated | Diocese of Galveston-Houston
| Archdiocese of Galveston-Houston
|