Below is a list of Costilla County CO zip codes. For your research we have also included Costilla County Area Code, Time Zone, UTC and the local County FIPS Code. Each Costilla County Colorado zip code has a center Longitude / Latitude point (the Costilla County center is -105.48300170898 / 37.17919921875). For your convenience we have also indicated if that zip code in Costilla County observes Daylight Savings time.