Henderson County, Illinois
Henderson County: county in Illinois, United States
About
Henderson County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 7,331 and a population density of 7 people per km². After 10 years in 2020 county had an estimated population of 6,535 inhabitants. Its county seat is Oquawka. The county was created 185 years ago in 1840.
County Snapshot
Henderson County at a glance
Henderson County currently has 11 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
11
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
OquawkaPopulation 1,231
Top linked places
Quick Facts about Henderson County
| Population | 6,535 (2020) |
| Country | United States of America |
| State | Illinois (United States) |
| Different from | Henderson County, Henderson County, Henderson County, Henderson County |
| Area | 1023 km2 |
| Water as percent of area | 4.1% |
| Land as percent of area | 95.9% |
| Latitude & Longitude | 40.8181,-90.9251 |
| Named for | Richard Henderson |
| Capital | Oquawka |
| Establishment | January 01, 1841 |
| Time Zone | America/Chicago |
| Local time | 19:33:02 (18th April 2026) |
| Density | 6 Pop. per km² as of 2020 |
| Population growth | -12.18% (2010-2020) |
| Weather | 52℉ Sunny 7-days weather |
Geography
Henderson County is located at 40°49'5"N 90°55'30"W (40.8181200, -90.9251100). It has 6 neighbors: Des Moines County, Lee County, Hancock County, McDonough County, Mercer County and Warren County.
Henderson County map
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The largest city of Henderson County is Oquawka with a population of 1,231. Other cities include, Gladstone population 257 and Media population 93. See all Henderson County cities & populated places.
Henderson County Populated Places
Cities, towns, neighborhoods & other populated places in Henderson County.
| City Name | Population | Title |
|---|---|---|
| Oquawka | 1,231 | Town in Henderson County, Illinois |
| Stronghurst | 774 | Township in Henderson County, Illinois |
| Lomax | 393 | Township in Henderson County, Illinois |
| Bald Bluff | 302 | Township in Henderson County, Illinois |
| Biggsville | 273 | Township in Henderson County, Illinois |
| Carman | 268 | Township in Henderson County, Illinois |
| Gladstone | 257 | Village in Henderson County, Illinois, United States |
| Rozetta | 241 | Township in Henderson County, Illinois |
| Terre Haute | 236 | Township in Henderson County, Illinois |
| Raritan | 131 | Township in Henderson County, Illinois |
| Media | 93 | Village in Illinois, USA |
Weather
Sunny, with a high near 52. Northwest wind 15 to 20 mph, with gusts as high as 30 mph.
7-Day ForecastOfficial website of Henderson County
Official WebsiteDemographics
According to census records, the population of Henderson County decreased by 12.18% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 7,331 | - | census |
| 2011 | 7,216 | -1.59% | estimation process |
| 2012 | 7,043 | -2.46% | estimation process |
| 2013 | 6,963 | -1.15% | estimation process |
| 2014 | 7,011 | 0.68% | estimation process |
| 2015 | 6,997 | -0.2% | estimation process |
| 2016 | 6,886 | -1.61% | estimation process |
| 2017 | 6,819 | -0.98% | estimation process |
| 2018 | 6,697 | -1.82% | estimation process |
| 2019 | 6,646 | -0.77% | estimation process |
| 2020 | 6,535 | -1.7% | estimation process |
Other places with the same name (4)
- Henderson County, North Carolina county in North Carolina, United States with a population of 118,445 people.
- Henderson County, Texas county in Texas, United States with a population of 83,792 people.
- Henderson County, Kentucky county in Kentucky, United States with a population of 44,740 people.
- Henderson County, Tennessee county in Tennessee, United States with a population of 28,076 people.
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 |
| Peoria County | 177,652 | County in Illinois, United States of America |
| McLean County | 171,256 | County in North Dakota, United States |
| Naperville | 147,986 | The second most populous city in Illinois. |