Below is a list of Brentwood CA zip codes. For your research we have also included Brentwood Area Code, Time Zone, UTC and the local Contra Costa County FIPS Code. Each Brentwood California zip code has a center Longitude / Latitude point (the Brentwood center is -121.694 / 37.9353). For your convenience we have also indicated if that zip code in Brentwood observes Daylight Savings time. For more information on Brentwood California you will find helpful business links and searches.