The Diocese of Fort Worth contains the following counties with a total area of 23,950 mi2: Archer, Baylor, Bosque, Clay, Comanche, Cooke, Denton, Eastland, Erath, Foard, Hardeman, Hill, Hood, Jack, Johnson, Knox, Montague, Palo Pinto, Parker, Shackelford, Somervell, Stephens, Tarrant, Throckmorton, Wichita, Wilbarger, Wise, and Young.

In 1870, Reverend Vincent Perrier of the Society of Mary started visiting Fort Worth twice a year.

By 1875, the population growth of Fort Worth had persuaded Bishop Claude Dubuis of Galveston to send Perrier and another priest to the town every month.

[1] After 1875, Irish Catholics workers started arriving in Fort Worth to work on the railroads, prompting the diocese to send a resident priest there.

The second bishop of Fort Worth was Reverend Joseph P. Delaney of the Diocese of Brownsville, appointed by Pope John Paul II in 1981.

In May 2005, Pope Benedict XVI appointed Monsignor Kevin Vann of the Diocese of Springfield in Illinois as coadjutor bishop in Fort Worth to assist Delaney.

[7] As of 2023, the bishop of the Diocese of Fort Worth is Michael Fors Olson, named by Pope Francis in 2013.

[8] In June 2018, Olson ordered Reverend Richard Kirkham to resign his post as pastor of St. Martin De Porres Catholic Church in Prosper.

[11] The Diocese of Fort Worth paid a $1.4 million settlement in 2005 to a man who claimed to have been raped as a child during the early 1990s by Reverend Thomas Teczar, a diocesan priest in Ranger.

[12] Teczar left the Diocese of Worcester in the early 1980s after being removed from ministry there for exhibiting attraction to adolescent boys.

The plaintiff had argued that Bishop Delaney showed negligence by allowing him to serve in Fort Worth despite his record in Massachusetts.

After being tried and convicted on rape charges in Eastland, Texas, Teczar was sentenced to 50 years in state prison.

[14] Jason Montgomery, a Washington State man, sued the diocese and Bishop Olson for $1 million in 2015, alleging he was sexually assaulted by Reverend John Sutton in the 1990s at Notre Dame Middle-High School in Wichita Falls, Texas.