15227 -- U.S. ZIP code Municipality (1990): BRENTWOOD, Pennsylvania All ZIPs for this municipality (1990): 15227 Population (2000): 29621 Housing Units (2000): 13461 Land area (2000): 6.076167 sq. miles (15.737200 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 6.076167 sq. miles (15.737200 sq. km) Located within: Pennsylvania (PA) Location: 40.377869 N, 79.975169 W