Creedmoor is a city in Travis County, Texas, United States. The population was 458 at the 2020 census. Creedmoor is located approximately 15 …Creedmoor is a city in Travis County, Texas, United States. The population was 458 at the 2020 census. Creedmoor is located approximately 15 miles south of Austin. According to the United States Census Bureau, the city has a total area of 2.1 square miles, all land.