'Putnam County, IL' definitions:

Putnam -- U.S. County in Illinois

From: Gazetteer 2000
Name :
Putnam -- U.S. County in Illinois
Population (2000) :
6086
Housing Units (2000) :
2888
Land area (2000) :
159.795597 sq. miles (413.868679 sq. km)
Water area (2000) :
12.446080 sq. miles (32.235199 sq. km)
Total area (2000) :
172.241677 sq. miles (446.103878 sq. km)
Located within :
Illinois (IL), FIPS 17
Location :
41.226096 N, 89.274381 W