Below is a list of Rialto CA zip codes. For your research we have also included Rialto Area Code, Time Zone, UTC and the local San Bernardino County FIPS Code. Each Rialto California zip code has a center Longitude / Latitude point (the Rialto center is -117.37000274658 / 34.106700897217). For your convenience we have also indicated if that zip code in Rialto observes Daylight Savings time.