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Winnebago County, Illinois

Winnebago County, Illinois
Seal of Winnebago County, Illinois
Seal
Map of Illinois highlighting Winnebago County
Location in the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded January 16, 1836
Named for Winnebago Tribe
Seat Rockford
Largest city Rockford
Area
 • Total 519 sq mi (1,344 km2)
 • Land 513 sq mi (1,329 km2)
 • Water 5.9 sq mi (15 km2), 1.1%
Population
 • (2010) 295,266
 • Density 575/sq mi (222/km²)
Congressional districts 16th, 17th
Time zone Central: UTC-6/-5
Website www.wincoil.us
Rockford, Illinois
Climate chart ()
J F M A M J J A S O N D
 
 
1.4
 
 
27
11
 
 
1.3
 
 
33
16
 
 
2.4
 
 
46
27
 
 
3.6
 
 
59
37
 
 
4
 
 
71
48
 
 
4.8
 
 
80
58
 
 
4.1
 
 
83
63
 
 
4.2
 
 
81
61
 
 
3.5
 
 
74
52
 
 
2.6
 
 
62
40
 
 
2.6
 
 
46
29
 
 
2.1
 
 
32
17
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel
J F M A M J J A S O N D
 
 
1.4
 
 
27
11
 
 
1.3
 
 
33
16
 
 
2.4
 
 
46
27
 
 
3.6
 
 
59
37
 
 
4
 
 
71
48
 
 
4.8
 
 
80
58
 
 
4.1
 
 
83
63
 
 
4.2
 
 
81
61
 
 
3.5
 
 
74
52
 
 
2.6
 
 
62
40
 
 
2.6
 
 
46
29
 
 
2.1
 
 
32
17
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel