63144 -- U.S. ZIP code Municipality (1990): BRENTWOOD, Missouri All ZIPs for this municipality (1990): 63144 Population (2000): 9072 Housing Units (2000): 4857 Land area (2000): 2.325618 sq. miles (6.023323 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.325618 sq. miles (6.023323 sq. km) Located within: Missouri (MO) Location: 38.619152 N, 90.349640 W