'Macoupin County, IL' definitions:

Macoupin -- U.S. County in Illinois

From: Gazetteer 2000
Name :
Macoupin -- U.S. County in Illinois
Population (2000) :
49019
Housing Units (2000) :
21097
Land area (2000) :
863.573999 sq. miles (2236.646294 sq. km)
Water area (2000) :
4.037948 sq. miles (10.458238 sq. km)
Total area (2000) :
867.611947 sq. miles (2247.104532 sq. km)
Located within :
Illinois (IL), FIPS 17
Location :
39.231191 N, 89.877556 W