Monroe, WA -- U.S. city in Washington Population (2000): 13795 Housing Units (2000): 4427 Land area (2000): 5.775838 sq. miles (14.959352 sq. km) Water area (2000): 0.033913 sq. miles (0.087833 sq. km) Total area (2000): 5.809751 sq. miles (15.047185 sq. km) FIPS code: 46685 Located within: Washington (WA), FIPS 53 Location: 47.857722 N, 121.988364 W ZIP Codes (1990): 98272 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Monroe, WA Monroe