Local city information for San Carlos, CA

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. San Carlos' ZIP code is 94070, and it is within the 650 area code.

The population was 27,718 at the 2000 census.

San Carlos is located at .

According to the United States Census Bureau, the city has a total area of 5.93 square miles (15.4 km²), of which, 5.92 square miles (15.3 km²) of it is land and 0.17% is water.

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