'Marion County, IL' definitions:
Marion -- U.S. County in Illinois
From: Gazetteer 2000
Name :
Marion -- U.S. County in Illinois
Population (2000) :
41691
Housing Units (2000) :
18022
Land area (2000) :
572.263846 sq. miles (1482.156493 sq. km)
Water area (2000) :
3.441171 sq. miles (8.912592 sq. km)
Total area (2000) :
575.705017 sq. miles (1491.069085 sq. km)
Located within :
Illinois (IL), FIPS 17
Location :
38.614865 N, 88.993656 W