'Seneca, IL' definitions:

Seneca, IL -- U.S. village in Illinois

From: Gazetteer 2000
Name :
Seneca, IL -- U.S. village in Illinois
Population (2000) :
2053
Housing Units (2000) :
786
Land area (2000) :
3.307397 sq. miles (8.566118 sq. km)
Water area (2000) :
0.258224 sq. miles (0.668796 sq. km)
Total area (2000) :
3.565621 sq. miles (9.234914 sq. km)
FIPS code :
68640
Located within :
Illinois (IL), FIPS 17
Location :
41.308618 N, 88.607010 W
ZIP Codes (1990) :
61360
Note :
some ZIP codes may be omitted esp. for suburbs.