The Texas Ranger Division, commonly called the Texas Rangers, is a law enforcement agency with statewide jurisdiction in Texas, and is based in Austin, Texas. Over the years, the Texas Rangers have investigated crimes ranging from murder to political corruption, acted as riot police and as detectives, protected the Governor of Texas, tracked down fugitives, and functioned as a paramilitary force at the service of both the Republic (1836–45) and the state of Texas.
The Texas Rangers were unofficially created by Stephen F. Austin in a call-to-arms written in 1823, and were formally constituted on October 17, 1835, by Daniel Parker as a member of the Permanent Council. The unit was dissolved by the federal authorities during the post-Civil War Reconstruction era, but was quickly reformed upon the reinstitution of home government. Since 1935, the organization has been a division of the Texas Department of Public Safety; it fulfills the role of Texas's State Bureau of Investigation. As of 2009, there are 144 commissioned members of the Ranger force.
The unit is the second-oldest state-level law enforcement agency in the United States. The Rangers have taken part in many of the most important events of Texas history, and were involved in some of the best-known criminal cases in the history of the Old West, such as those of gunfighter John Wesley Hardin, bank robber Sam Bass, and outlaws Bonnie and Clyde. Scores of books have been written about the Rangers, from well-researched works of nonfiction to pulp novels, making them significant participants in the mythology of the Wild West. During their long history, a distinct Ranger tradition has evolved; their cultural significance to Texians and later Texans is such that they are legally protected against disbandment. There is a museum dedicated to the Texas Rangers in Waco, Texas.