Petersburg, MI -- U.S. city in Michigan Population (2000): 1157 Housing Units (2000): 442 Land area (2000): 0.463201 sq. miles (1.199685 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.463201 sq. miles (1.199685 sq. km) FIPS code: 63800 Located within: Michigan (MI), FIPS 26 Location: 41.898600 N, 83.714089 W ZIP Codes (1990): 49270 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Petersburg, MI Petersburg