San Carlos is a city in San Mateo County, California, USA on the San Francisco Peninsula, about halfway between San Francisco and San Jose. It is an affluent small residential suburb located between Belmont to the north and Redwood City to the south. The 94070 zip code is located in the San Carlos community of California in San Mateo county. You can learn more about Real Estate in San Carlos CA 94070 below, including current Homes For Sale: Condos, Townhomes, Foreclosures and Bank Owned Properties, Short Sales and more. Our Local San Carlos CA Realtors can assist you with selling your home in California or buying your next piece of Real Estate in or around the San Carlos CA 94070 community. Be sure to check out our FREE Instant Home Value wizard to get a quick report on your homes current estimated value.