'Eureka, IL' definitions:

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

From: Gazetteer 2000
Name :
Eureka, IL -- U.S. city in Illinois
Population (2000) :
4871
Housing Units (2000) :
1831
Land area (2000) :
2.690478 sq. miles (6.968306 sq. km)
Water area (2000) :
0.048032 sq. miles (0.124403 sq. km)
Total area (2000) :
2.738510 sq. miles (7.092709 sq. km)
FIPS code :
24543
Located within :
Illinois (IL), FIPS 17
Location :
40.715620 N, 89.275220 W
ZIP Codes (1990) :
61530
Note :
some ZIP codes may be omitted esp. for suburbs.