'Cumberland County, IL' definitions:

Cumberland -- U.S. County in Illinois

From: Gazetteer 2000
Name :
Cumberland -- U.S. County in Illinois
Population (2000) :
11253
Housing Units (2000) :
4876
Land area (2000) :
346.016683 sq. miles (896.179057 sq. km)
Water area (2000) :
0.979918 sq. miles (2.537976 sq. km)
Total area (2000) :
346.996601 sq. miles (898.717033 sq. km)
Located within :
Illinois (IL), FIPS 17
Location :
39.272064 N, 88.263215 W