'Round Lake Park, IL' definitions:

Round Lake Park, IL -- U.S. village in Illinois

From: Gazetteer 2000
Name :
Round Lake Park, IL -- U.S. village in Illinois
Population (2000) :
6038
Housing Units (2000) :
2229
Land area (2000) :
2.989954 sq. miles (7.743946 sq. km)
Water area (2000) :
0.054597 sq. miles (0.141405 sq. km)
Total area (2000) :
3.044551 sq. miles (7.885351 sq. km)
FIPS code :
66066
Located within :
Illinois (IL), FIPS 17
Location :
42.343688 N, 88.079175 W
Note :
some ZIP codes may be omitted esp. for suburbs.