Below is a list of Alameda County CA zip codes. For your research we have also included Alameda County Area Code, Time Zone, UTC and the local County FIPS Code. Each Alameda County California zip code has a center Longitude / Latitude point (the Alameda County center is -122.16000366211 / 37.751998901367). For your convenience we have also indicated if that zip code in Alameda County observes Daylight Savings time.