Stephenson County, Illinois
Stephenson County: county in Illinois, United States
About
Stephenson County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 47,711 and a population density of 33 people per km². After 10 years in 2020 county had an estimated population of 43,831 inhabitants. Its county seat is Freeport. The county was created 189 years ago in 1836.
County Snapshot
Stephenson County at a glance
Stephenson County currently has 15 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
15
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
FreeportPopulation 23,447
Top linked places
Quick Facts about Stephenson County
| Population | 43,831 (2020) |
| Country | United States of America |
| State | Illinois (United States) |
| Different from | Stephens County, Stephens County, Stephens County |
| Area | 1463 km2 |
| Water as percent of area | 0.09% |
| Land as percent of area | 99.91% |
| Latitude & Longitude | 42.3518,-89.6624 |
| Named for | Benjamin Stephenson |
| Altitude | 781 feet / 238 meters |
| Capital | Freeport |
| Establishment | January 01, 1837 |
| Time Zone | America/Chicago |
| Local time | 18:50:18 (14th April 2026) |
| Density | 30 Pop. per km² as of 2020 |
| Population growth | -8.85% (2010-2020) |
| Weather | 74℉ Showers And Thunderstorms 7-days weather |
Geography
Stephenson County is located at 42°21'6"N 89°39'44"W (42.3517500, -89.6623500). It has 5 neighbors: Carroll County, Jo Daviess County, Ogle County, Green County and Lafayette County.
Stephenson County map
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The largest city of Stephenson County is Freeport with a population of 23,447. Other cities include, Lena population 2,680, Loran population 1,327, Rock Grove population 1,296 and Oneco population 1,228. See all Stephenson County cities & populated places.
Stephenson County Populated Places
Cities, towns, neighborhoods & other populated places in Stephenson County.
| City Name | Population | Title |
|---|---|---|
| Freeport | 23,447 | City in Illinois |
| Lena | 2,680 | Human settlement in Illinois, United States of America |
| Loran | 1,327 | Unincorporated community in Illinois, United States |
| Rock Grove | 1,296 | Unincorporated community in Illinois |
| Oneco | 1,228 | Human settlement in Illinois, United States of America |
| Kent | 787 | Human settlement in Illinois, United States of America |
| Pearl City | 772 | Village in the United States |
| Orangeville | 737 | Human settlement in Illinois, United States of America |
| Cedarville | 675 | Human settlement in Stephenson County, Illinois, United States of America |
| Davis | 616 | Village in Stephenson County, Illinois, USA |
| Dakota | 459 | Town in Stephenson County, Illinois, United States |
| German Valley | 417 | Village in Illinois |
| Rock City | 279 | Village in Illinois |
| Winslow | 272 | Human settlement in Illinois, United States of America |
| Ridott | 149 | Human settlement in Illinois, United States of America |
Weather
Showers and thunderstorms. Mostly cloudy, with a high near 74. Chance of precipitation is 80%.
7-Day ForecastOfficial website of Stephenson County
Official WebsiteDemographics
According to census records, the population of Stephenson County decreased by 8.85% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 47,711 | - | census |
| 2011 | 47,323 | -0.82% | estimation process |
| 2012 | 46,886 | -0.93% | estimation process |
| 2013 | 46,671 | -0.46% | estimation process |
| 2014 | 46,269 | -0.87% | estimation process |
| 2015 | 45,668 | -1.32% | estimation process |
| 2016 | 45,503 | -0.36% | estimation process |
| 2017 | 44,997 | -1.12% | estimation process |
| 2018 | 44,797 | -0.45% | estimation process |
| 2019 | 44,498 | -0.67% | estimation process |
| 2020 | 43,831 | -1.52% | estimation process |
People born in Stephenson County (2)
People born in Stephenson County, including politician Homer F. Aspinwall, biologist, botanist, zoologist and entomologist Harrison Garman, .
More notable 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. |