Below is a list of Castroville TX zip codes. For your research we have also included Castroville Area Code, Time Zone, UTC and the local Medina County FIPS Code. Each Castroville Texas zip code has a center Longitude / Latitude point (the Castroville center is -98.876502990723 / 29.354900360107). For your convenience we have also indicated if that zip code in Castroville observes Daylight Savings time.