'Oak Park, IL' definitions:

Oak Park, IL -- U.S. village in Illinois

From: Gazetteer 2000
Name :
Oak Park, IL -- U.S. village in Illinois
Population (2000) :
52524
Housing Units (2000) :
23723
Land area (2000) :
4.700821 sq. miles (12.175071 sq. km)
Water area (2000) :
0.000000 sq. miles (0.000000 sq. km)
Total area (2000) :
4.700821 sq. miles (12.175071 sq. km)
FIPS code :
54885
Located within :
Illinois (IL), FIPS 17
Location :
41.885981 N, 87.790332 W
ZIP Codes (1990) :
60301 60302 60304
Note :
some ZIP codes may be omitted esp. for suburbs.