Castle Hills is a suburb of San Antonio with a population of 4,459. Castle Hills is in Bexar County and is one of the best places to live in Texas. Living in Castle Hills offers residents an urban suburban mix feel and most residents own their homes. In Castle Hills there are a lot of bars, restaurants, coffee shops, and parks. Many retirees live in Castle Hills and residents tend to have moderate political views. The public schools in Castle Hills are above average.