'Rock County, WI' definitions:

Rock -- U.S. County in Wisconsin

From: Gazetteer 2000
Name :
Rock -- U.S. County in Wisconsin
Population (2000) :
152307
Housing Units (2000) :
62187
Land area (2000) :
720.468467 sq. miles (1866.004683 sq. km)
Water area (2000) :
5.728001 sq. miles (14.835453 sq. km)
Total area (2000) :
726.196468 sq. miles (1880.840136 sq. km)
Located within :
Wisconsin (WI), FIPS 55
Location :
42.654411 N, 89.049110 W