San Saba is a city located in, and the county seat of, San Saba County, Texas, United States. It was settled in 1854 and named for its locatio…San Saba is a city located in, and the county seat of, San Saba County, Texas, United States. It was settled in 1854 and named for its location on the San Saba River and for Sabbas the Sanctified. Its population was 3,099 at the 2010 census.