Below is a list of Diamond Bar CA zip codes. For your research we have also included Diamond Bar Area Code, Time Zone, UTC and the local Los Angeles County FIPS Code. Each Diamond Bar California zip code has a center Longitude / Latitude point (the Diamond Bar center is -117.81099700928 / 34.000999450684). For your convenience we have also indicated if that zip code in Diamond Bar observes Daylight Savings time.