Cedar Park is a city in Williamson County in the State of Texas. The population was 48,937 at the 2010 census. According to the 2017 Census Estimate, the population is 75,226. A small portion of the city extends into neighboring Travis County. The city is a major suburb of Austin, the center of which is approximately 16mi to the southeast.GeographyCedar Park is located at . It lies mostly in Williamson County, although a small amount extends into Travis County.According to the United States Census Bureau, the city has a total area of 25.6sqmi, of which, 25.3sqmi of it is land and.3sqmi of it is water.Cedar Park is generally bisected north to south by U.S. Route 183. A bypass route, the 183A toll road, also runs through Cedar Park and opened to traffic on March 15, 2007. Major east-west routes include RM-1431/Whitestone Boulevard and Cypress Creek/Brushy Creek Road.