'Oakland, IL' definitions:

Oakland, IL -- U.S. city in Illinois

From: Gazetteer 2000
Name :
Oakland, IL -- U.S. city in Illinois
Population (2000) :
996
Housing Units (2000) :
437
Land area (2000) :
0.819201 sq. miles (2.121722 sq. km)
Water area (2000) :
0.043126 sq. miles (0.111697 sq. km)
Total area (2000) :
0.862327 sq. miles (2.233419 sq. km)
FIPS code :
54781
Located within :
Illinois (IL), FIPS 17
Location :
39.656788 N, 88.025401 W
ZIP Codes (1990) :
61943
Note :
some ZIP codes may be omitted esp. for suburbs.