Cities in Winnebago County, Illinois by Population (2024)

There are 25 cities in Winnebago County, Illinois.

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Rockford1Illinois145,019148,407-0.58%2,22865.08
Belvidere2Illinois25,06325,275-0.21%2,00312.51
Loves Park3Illinois23,33023,400-0.07%1,42916.32
Machesney Park4Illinois22,57222,932-0.4%1,77912.69
Roscoe5Illinois10,78310,965-0.42%1,05010.27
South Beloit6Illinois7,8417,975-0.42%1,2766.14
Rockton7Illinois7,7257,853-0.41%1,1266.86
Poplar Grove8Illinois5,1595,0550.51%6557.88
Candlewick Lake9Illinois4,9325,351-1.48%2,6671.85
Winnebago10Illinois2,8632,925-0.52%1,4801.93
Cherry Valley11Illinois2,8452,895-0.42%3388.40
Davis Junction12Illinois2,5402,5100.32%6054.20
Lake Summerset13Illinois2,2721,9583.6%1,0722.12
Pecatonica14Illinois2,0262,080-0.64%1,5791.28
Durand15Illinois1,3601,390-0.51%1,4800.92
Westlake Village16Illinois1,2181,744-8.56%1,3220.92
Stillman Valley17Illinois1,0481,074-0.57%1,8390.57
Timberlane18Illinois9099030.22%5211.75
Argyle19Illinois79935316.3%9110.88
New Milford20Illinois787795-0.25%3052.58
Davis21Illinois564590-1.05%1,3790.41
Leaf River22Illinois418428-0.48%4810.87
Caledonia23Illinois1811830%1751.03
Holcomb24Illinois1771572.91%1,9890.09
Adeline25Illinois74760%2780.27
showing: 25 rows

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

What is the largest city in Winnebago County, Illinois?

Rockford is the largest city in Winnebago County.

What is the smallest city in Winnebago County, Illinois?

Adeline is the smallest city in Winnebago County.

How many cities are in Winnebago County?

There are 25 cities in Winnebago County, Illinois.

Frequently Asked Questions