Montcalm -- U.S. County in Michigan Population (2000): 61266 Housing Units (2000): 25900 Land area (2000): 708.040009 sq. miles (1833.815128 sq. km) Water area (2000): 12.943946 sq. miles (33.524665 sq. km) Total area (2000): 720.983955 sq. miles (1867.339793 sq. km) Located within: Michigan (MI), FIPS 26 Location: 43.308939 N, 85.184031 W Headwords: Montcalm Montcalm, MI Montcalm County Montcalm County, MI