Castle Real EstateCastle real estate listings include condos, townhomes, and single family homes for sale. Commercial properties are also available. If you see a property you’re interested in, contact a Castle real estate agent to arrange a tour today! Castle, Pennsylvania has a population of 11,217. The median household income in Castle, Pennsylvania is $31,044. The median household income for the surrounding county is $47,188 compared to the national median of $57,652. The median age of people living in Castle is 42.4 years. Castle WeatherThe average high temperature in July is 84 degrees, with an average low temperature in January of 18.3 degrees. The average rainfall is approximately 39.5 inches per year, with 29.3 inches of snow per year. Nearby Homes for Sale |