Below is a list of Rio Frio TX zip codes. For your research we have also included Rio Frio Area Code, Time Zone, UTC and the local Real County FIPS Code. Each Rio Frio Texas zip code has a center Longitude / Latitude point (the Rio Frio center is -99.737396240234 / 29.63450050354). For your convenience we have also indicated if that zip code in Rio Frio observes Daylight Savings time.