'Jefferson County, IA' definitions:
Jefferson -- U.S. County in Iowa
From: Gazetteer 2000
Name :
Jefferson -- U.S. County in Iowa
Population (2000) :
16181
Housing Units (2000) :
7241
Land area (2000) :
435.340811 sq. miles (1127.527476 sq. km)
Water area (2000) :
1.376020 sq. miles (3.563874 sq. km)
Total area (2000) :
436.716831 sq. miles (1131.091350 sq. km)
Located within :
Iowa (IA), FIPS 19
Location :
41.031640 N, 91.963376 W