Peoria County, Illinois
Peoria County: county in Illinois, United States of America
About
Peoria County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 186,494 and a population density of 114 people per km². After 10 years in 2020 county had an estimated population of 177,652 inhabitants. Its county seat is Peoria. The county was created 201 years ago in 1824.
County Snapshot
Peoria County at a glance
Peoria County currently has 21 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
21
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Illinois counties
102
Open related pagesLargest city
PeoriaPopulation 109,428
Top linked places
Quick Facts about Peoria County
| Population | 177,652 (2020) |
| Country | United States of America |
| State | Illinois (United States) |
| Area | 1634 km2 |
| Water as percent of area | 1.8% |
| Land as percent of area | 98.2% |
| Latitude & Longitude | 40.7881,-89.7600 |
| Named for | Peoria tribe |
| Altitude | 620 feet / 189 meters |
| Capital | Peoria |
| Establishment | January 01, 1825 |
| Time Zone | America/Chicago |
| Local time | 18:16:29 (17th April 2026) |
| Density | 109 Pop. per km² as of 2020 |
| Population growth | -4.98% (2010-2020) |
| Weather | 85℉ Mostly Sunny then Chance Showers And Thunderstorms 7-days weather |
Geography
Peoria County is located at 40°47'17"N 89°45'36"W (40.7880800, -89.7599900). It has 5 neighbors: Fulton County, Knox County, Marshall County, Stark County and Woodford County.
Peoria County map
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The largest city of Peoria County is Peoria with a population of 109,428. Other cities include, Bartonville population 6,049, North Peoria population 6,000, Peoria Heights population 5,722 and West Peoria population 4,409. See all Peoria County cities & populated places.
Peoria County Populated Places (more)
Cities, towns, neighborhoods & other populated places in Peoria County.
| City Name | Population | Title |
|---|---|---|
| Peoria | 109,428 | The third most populous city in Illinois. |
| Kickapoo | 6,907 | Township in Peoria County, Illinois |
| Bartonville | 6,049 | Village in Peoria County, Illinois |
| North Peoria | 6,000 | A census-designated place in Peoria County, Illinois. |
| Chillicothe | 5,955 | Civil township in northeast Peoria County, Illinois |
| Peoria Heights | 5,722 | Village in eastern Peoria County, Illinois |
| West Peoria | 4,409 | City in Peoria County, Illinois |
| Bellevue | 2,037 | Village in Illinois, United States |
| Elmwood | 1,995 | City in Peoria County, Illinois, United States |
| Hollis | 1,803 | Township in Peoria County, Illinois |
| Princeville | 1,663 | Township in Peoria County, Illinois |
| Rome | 1,596 | Unincorporated census-designated place in Illinois, United States |
| Dunlap | 1,440 | Village in Illinois, USA |
| Hanna City | 1,182 | Human settlement in United States of America |
| Akron | 1,023 | City in United States of America |
| Trivoli | 976 | Civil township in western Peoria County, Illinois |
Weather
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 40%.
7-Day ForecastOfficial website of Peoria County
Official WebsiteDemographics
According to census records, the population of Peoria County decreased by 4.98% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 186,494 | - | census |
| 2011 | 186,754 | 0.14% | estimation process |
| 2012 | 187,317 | 0.3% | estimation process |
| 2013 | 188,643 | 0.7% | estimation process |
| 2014 | 187,512 | -0.6% | estimation process |
| 2015 | 186,481 | -0.55% | estimation process |
| 2016 | 185,043 | -0.78% | estimation process |
| 2017 | 182,525 | -1.38% | estimation process |
| 2018 | 180,620 | -1.05% | estimation process |
| 2019 | 179,179 | -0.8% | estimation process |
| 2020 | 177,652 | -0.86% | estimation process |
People born in Peoria County (6)
People born in Peoria County, including politician Charles J. Colden, political consultant Michael Connell, United States Army Medal of Honor recipient Matthew Bickford, .
More notable people
- Mary Emma Holmes (American suffragist) she was born in 03/08/1839
- Mary Alvie Hail (American newspaper editor (1856-1934)) she was born in 06/09/1856
- Frank L. Engle (American artist) he was born in 01/01/1916
Illinois Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Cook County | 5,108,284 | County in Illinois, United States |
| Chicago | 2,677,643 | The third most populous city in the United States and the center of the Chicago metropolitan area. |
| DuPage County | 917,481 | County in Illinois, United States |
| Lake County | 693,593 | County in Oregon, United States |
| Will County | 688,726 | County in Illinois, United States |
| Kane County | 531,010 | County in southern Utah, United States |
| McHenry County | 305,888 | County in Illinois, United States |
| Winnebago County | 281,295 | County in Illinois, United States |
| Madison County | 262,635 | County in Montana, United States |
| Saint Clair County | 258,046 | The County of St. |
| Champaign County | 209,192 | County in Illinois, United States |
| Aurora | 196,383 | The second most populous city in Illinois. |
| Sangamon County | 193,882 | County in Illinois, United States |
| McLean County | 171,256 | County in North Dakota, United States |
| Naperville | 147,986 | The second most populous city in Illinois. |
| Rockford | 144,835 | The second most populous city in Illinois. |