Below is a list of Alamo CA zip codes. For your research we have also included Alamo Area Code, Time Zone, UTC and the local Contra Costa County FIPS Code. Each Alamo California zip code has a center Longitude / Latitude point (the Alamo center is -122.02 / 37.8528). For your convenience we have also indicated if that zip code in Alamo observes Daylight Savings time. For more information on Alamo California you will find helpful business links and searches.