Pentwater, MI -- U.S. village in Michigan Population (2000): 958 Housing Units (2000): 904 Land area (2000): 1.305452 sq. miles (3.381105 sq. km) Water area (2000): 0.327494 sq. miles (0.848206 sq. km) Total area (2000): 1.632946 sq. miles (4.229311 sq. km) FIPS code: 63540 Located within: Michigan (MI), FIPS 26 Location: 43.780391 N, 86.429916 W ZIP Codes (1990): 49449 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Pentwater, MI Pentwater