Below is a list of Rio Vista CA zip codes. For your research we have also included Rio Vista Area Code, Time Zone, UTC and the local Solano County FIPS Code. Each Rio Vista California zip code has a center Longitude / Latitude point (the Rio Vista center is -121.71299743652 / 38.173301696777). For your convenience we have also indicated if that zip code in Rio Vista observes Daylight Savings time.