Stonewall is an unincorporated community and census-designated place (CDP) in Gillespie County, Texas, United States. The population was 525 at the 2010 census. It was named for Confederate General Thomas J. (Stonewall) Jackson, by Israel P. Nunez, who established a stage station near the site in 1870.

Gillespie County is a county located on the Edwards Plateau in the U.S. state of Texas. As of the 2020 census, its population was 26,725. The county seat is Fredericksburg. It is located in the heart of the rural Texas Hill Country in Central Texas. Gillespie is named for Robert Addison Gillespie, a soldier in the Mexican–American War.