Millbrae, CA is a city located in San Mateo County, California and has a land area of 3.37 square miles (8.73 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in Millbrae, California and it is 94030. The area code(s) for Millbrae is 650.
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