Winnebago County Population 2018

Winnebago County's estimated population is 284,778 with a growth rate of -0.46% 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
2017284,778-1,310-0.46%
2016286,088-1,053-0.37%
2015287,141-1,529-0.53%
2014288,670-2,213-0.76%
2013290,883-1,166-0.40%
2012292,049-1,522-0.52%
2011293,571-1,517-0.51%
2010295,08842,17516.68%
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
White232,58381.67%
Black or African American37,47913.16%
Asian7,9212.78%
Two or More Races7,5672.66%
American Indian and Alaska Native1,4760.52%
Native Hawaiian and Other Pacific Islander1420.05%

Winnebago County Population Pyramid

0k2k4k6k8k10k Male Population0k2k4k6k8k10k Female Population8580757065605550454035302520151050
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