Below is a list of Monrovia CA zip codes. For your research we have also included Monrovia Area Code, Time Zone, UTC and the local Los Angeles County FIPS Code. Each Monrovia California zip code has a center Longitude / Latitude point (the Monrovia center is -118.00099945068 / 34.159801483154). For your convenience we have also indicated if that zip code in Monrovia observes Daylight Savings time.