Johnson City is a city located in the state of Texas, United States. It serves as the county seat of Blanco County and is situated within the Texas-German belt region.
Founded in 1879, the city was named in honor of early settler James Polk Johnson. He was the nephew of Sam E. Johnson, Sr., and the uncle of U.S. President Lyndon B. Johnson. As of the 2020 census, the population of Johnson City was 1,627.