'O'Fallon, IL' definitions:

O'Fallon, IL -- U.S. city in Illinois

Name :

O'Fallon, IL -- U.S. city in Illinois

Population (2000) :

21910

Housing Units (2000) :

8626

Land area (2000) :

10.913309 sq. miles (28.265340 sq. km)

Water area (2000) :

0.011844 sq. miles (0.030675 sq. km)

Total area (2000) :

10.925153 sq. miles (28.296015 sq. km)

FIPS code :

55249

Located within :

Illinois (IL), FIPS 17

Location :

38.591549 N, 89.912000 W

Note :

some ZIP codes may be omitted esp. for suburbs.