Winnebago County Population 2017

Winnebago County's estimated population is 285,873 with a growth rate of -0.45% in the past year according to the most recent United States census data. Winnebago County is the 7th largest county in Illinois.

Year Population Growth Growth Rate
2016285,873-1,295-0.45%
2015287,168-1,471-0.51%
2014288,639-2,229-0.77%
2013290,868-1,066-0.37%
2012291,934-1,686-0.57%
2011293,620-1,486-0.50%
2010295,10642,19316.68%
1990252,9132,0290.81%
1980250,8844,2611.73%
1970246,62336,85817.57%
1960209,76557,38037.65%
1950152,38531,20725.75%
1940121,1783,8053.24%
1930117,37326,44429.08%
192090,92927,77643.98%
191063,15315,30831.99%
190047,8457,90719.80%
189039,9389,43330.92%
188030,5051,2044.11%
187029,3014,81019.64%
186024,49112,718108.03%
185011,7737,164155.44%
18404,6090.00%

Winnebago County Population Growth

Population Data via

Winnebago County Race Data

Race Population Percentage
White232,58381.36%
Black or African American37,47913.11%
Asian7,9212.77%
Two or More Races7,5672.65%
American Indian and Alaska Native1,4760.52%
Native Hawaiian and Other Pacific Islander1420.05%

Winnebago County Population Pyramid

0k2k4k6k8k10kWinnebago County Male Population0k2k4k6k8k10kWinnebago County Female Population

Population of Cities in Winnebago County

City 2010 Census 2016 Estimated Growth Growth Rate
Rockford153162147651-5511-3.60%
Loves Park2399923413-586-2.44%
Machesney Park2349522873-622-2.65%
Roscoe1078210521-261-2.42%
South Beloit78967652-244-3.09%
Rockton76857499-186-2.42%
Cherry Valley31623087-75-2.37%
Winnebago31013002-99-3.19%
Pecatonica22032111-92-4.18%
Durand14501404-46-3.17%
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990