Below is a list of Atwater CA zip codes. For your research we have also included Atwater Area Code, Time Zone, UTC and the local Merced County FIPS Code. Each Atwater California zip code has a center Longitude / Latitude point (the Atwater center is -120.613 / 37.3473). For your convenience we have also indicated if that zip code in Atwater observes Daylight Savings time. For more information on Atwater California you will find helpful business links and searches.