Mercer County, Missouri
Mercer County: county in Missouri, United States
About
Mercer County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 3,785 and a population density of 3 people per km². After 10 years in 2020 county had an estimated population of 3,558 inhabitants. Its county seat is Princeton. The county was created 181 years ago in 1844.
County Snapshot
Mercer County at a glance
Mercer County currently has 4 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
4
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Missouri counties
115
Open related pagesLargest city
PrincetonPopulation 1,078
Top linked places
Quick Facts about Mercer County
| Population | 3,558 (2020) |
| Country | United States of America |
| State | Missouri (United States) |
| Different from | Mercer County, Mercer County, Mercer County, Mercer County, Mercer County, Mercer County, Mercer County |
| Area | 1179 km2 |
| Water as percent of area | 0.3% |
| Land as percent of area | 99.7% |
| Latitude & Longitude | 40.4223,-93.5686 |
| Named for | John Francis Mercer |
| Capital | Princeton |
| Establishment | January 01, 1845 |
| Time Zone | America/Chicago |
| Local time | 02:28:27 (15th April 2026) |
| Density | 3 Pop. per km² as of 2020 |
| Population growth | -6.38% (2010-2020) |
| Weather | 76℉ Chance Showers And Thunderstorms 7-days weather |
Geography
Mercer County is located at 40°25'20"N 93°34'7"W (40.4223300, -93.5685600). It has 6 neighbors: Decatur County, Wayne County, Grundy County, Harrison County, Putnam County and Sullivan County.
Mercer County map
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The largest city of Mercer County is Princeton with a population of 1,078. Other cities include, Mercer population 296 and South Lineville population 27. See all Mercer County cities & populated places.
Mercer County Populated Places
Cities, towns, neighborhoods & other populated places in Mercer County.
| City Name | Population | Title |
|---|---|---|
| Princeton | 1,078 | City in Mercer County, Missouri |
| Mercer | 296 | City in Missouri, USA |
| Ravanna | 205 | Township in Mercer County, Missouri |
| South Lineville | 27 | Village in the United States |
Weather
A chance of showers and thunderstorms. Mostly sunny, with a high near 76. Chance of precipitation is 40%.
7-Day Forecast- Princeton
Demographics
According to census records, the population of Mercer County decreased by 6.38% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 3,785 | - | census |
| 2011 | 3,774 | -0.29% | estimation process |
| 2012 | 3,708 | -1.78% | estimation process |
| 2013 | 3,664 | -1.2% | estimation process |
| 2014 | 3,683 | 0.52% | estimation process |
| 2015 | 3,660 | -0.63% | estimation process |
| 2016 | 3,661 | 0.03% | estimation process |
| 2017 | 3,656 | -0.14% | estimation process |
| 2018 | 3,626 | -0.83% | estimation process |
| 2019 | 3,617 | -0.25% | estimation process |
| 2020 | 3,558 | -1.66% | estimation process |
People born in Mercer County (1)
Texas politician Roy Alvin Baldwin was born in Mercer County
Other places with the same name (7)
- Mercer County, New Jersey county in West Virginia, United States with a population of 367,239 people.
- Mercer County, Pennsylvania county in Pennsylvania, United States with a population of 108,545 people.
- Mercer County, West Virginia county in West Virginia, United States with a population of 58,258 people.
- Mercer County, Ohio county in Ohio, United States with a population of 41,274 people.
- Mercer County, Kentucky county in Kentucky, United States with a population of 21,889 people.
- Mercer County, Illinois county in Illinois, United States with a population of 15,225 people.
- Mercer County, North Dakota county in North Dakota, United States with a population of 8,174 people.
Missouri Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Saint Louis County | 994,020 | County in Minnesota, United States |
| Jackson County | 705,925 | County in Oregon, United States |
| Kansas City | 495,327 | The third most populous city in Missouri and the center of the Kansas City metropolitan area. |
| Saint Charles County | 406,204 | County in Missouri, United States |
| St. Louis | 315,685 | The second most populous city in Missouri and the center of the St. |
| Greene County | 294,997 | County in Tennessee, United States |
| Clay County | 253,463 | County in North Carolina, United States |
| Jefferson County | 226,543 | County in Missouri, United States |
| Boone County | 182,991 | County in West Virginia, United States |
| Columbia | 124,769 | The most populous city in the state of Missouri. |
| Jasper County | 121,648 | County in South Carolina, United States |
| Independence | 116,774 | A city in Jackson County, Missouri. |
| East Independence | 110,675 | A census-designated place in Jackson County, Missouri. |
| Cass County | 106,806 | County in Missouri, United States |
| Platte County | 106,532 | County in Wyoming, United States |
| Franklin County | 104,469 | County in Missouri, United States |