'Ottawa, IL' definitions:

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

From: Gazetteer 2000
Name :
Ottawa, IL -- U.S. city in Illinois
Population (2000) :
18307
Housing Units (2000) :
8030
Land area (2000) :
7.329036 sq. miles (18.982114 sq. km)
Water area (2000) :
0.333547 sq. miles (0.863884 sq. km)
Total area (2000) :
7.662583 sq. miles (19.845998 sq. km)
FIPS code :
56926
Located within :
Illinois (IL), FIPS 17
Location :
41.347118 N, 88.842184 W
ZIP Codes (1990) :
61350
Note :
some ZIP codes may be omitted esp. for suburbs.