Below is a list of Hillsborough CA zip codes. For your research we have also included Hillsborough Area Code, Time Zone, UTC and the local San Mateo County FIPS Code. Each Hillsborough California zip code has a center Longitude / Latitude point (the Hillsborough center is -122.36034393311 / 37.570236206055). For your convenience we have also indicated if that zip code in Hillsborough observes Daylight Savings time.