'Johnson County, IA' definitions:
Johnson -- U.S. County in Iowa
From: Gazetteer 2000
Name :
Johnson -- U.S. County in Iowa
Population (2000) :
111006
Housing Units (2000) :
45831
Land area (2000) :
614.479195 sq. miles (1591.493741 sq. km)
Water area (2000) :
8.870559 sq. miles (22.974641 sq. km)
Total area (2000) :
623.349754 sq. miles (1614.468382 sq. km)
Located within :
Iowa (IA), FIPS 19
Location :
41.674915 N, 91.568871 W