About Castroville, CACastroville is located in California. Castroville, California has a population of 6,543. Castroville is more family-centric than the surrounding county with 56% households with children. The county percentage for households with children is 35%. The median household income in Castroville, California is $51,895. The median household income for the surrounding county is $63,329 compared to the national median of $57,525. The median age of people living in Castroville is 30.6 years. Castroville WeatherThe average high temperature in July is 71.4 degrees, with an average low temperature in January of 40.6 degrees. The annual precipitation is 15.12. Castroville MapCastroville real estate officesReal estate near CastrovilleNearby CitiesNearby Cities Homes for Sale |