Millbrae, California, United States [City]; population was 20,412 in 1990; housing units was 8,158 in 1990; location is 37°36'N 122°24'W; land area is 3.21 square miles (2,056 acres); water area is 0.02 square miles (10 acres); FIPS code is 47486 [SourceCBP]