'Mount Vernon, IL' definitions:

Mount Vernon, IL -- U.S. city in Illinois

From: Gazetteer 2000
Name :
Mount Vernon, IL -- U.S. city in Illinois
Population (2000) :
16269
Housing Units (2000) :
7814
Land area (2000) :
11.521257 sq. miles (29.839917 sq. km)
Water area (2000) :
0.098604 sq. miles (0.255382 sq. km)
Total area (2000) :
11.619861 sq. miles (30.095299 sq. km)
FIPS code :
51180
Located within :
Illinois (IL), FIPS 17
Location :
38.313512 N, 88.908159 W
ZIP Codes (1990) :
62864
Note :
some ZIP codes may be omitted esp. for suburbs.