'Monroe County, MI' definitions:

Monroe -- U.S. County in Michigan

From: Gazetteer 2000
Name :
Monroe -- U.S. County in Michigan
Population (2000) :
145945
Housing Units (2000) :
56471
Land area (2000) :
551.100358 sq. miles (1427.343313 sq. km)
Water area (2000) :
128.927641 sq. miles (333.921043 sq. km)
Total area (2000) :
680.027999 sq. miles (1761.264356 sq. km)
Located within :
Michigan (MI), FIPS 26
Location :
41.919053 N, 83.484125 W