Castle Hills, TexasWhere is Castle Hills, Texas?Castle Hills, Texas is located at Latitude 29.523833 and Longitude -98.519181. Please explore this site for detailed population, demographic and housing data for Castle Hills, Texas. JavaScript must be enabled in order for you to use Google Maps. However, it seems JavaScript is either disabled or not supported by your browser. To view Google Maps, enable JavaScript by changing your browser options, and then try again.