Mercer County, Ohio
Mercer County: county in Ohio, United States.
About
Mercer County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 40,814 and a population density of 33 people per km². After 10 years in 2020 county had an estimated population of 41,274 inhabitants. Its county seat is Celina. The county was created 202 years ago in 1824.
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.
Ohio counties
88
Open related pagesLargest city
CelinaPopulation 10,438
Top linked places
Quick Facts about Mercer County
| Population | 41,274 (2020) |
| Country | United States of America |
| State | Ohio (United States) |
| Different from | Mercer County, Mercer County, Mercer County, Mercer County, Mercer County, Mercer County, Mercer County |
| Plate code | 54 |
| Area | 1226 km2 |
| Water as percent of area | 2.3% |
| Land as percent of area | 97.7% |
| Latitude & Longitude | 40.5400,-84.6294 |
| Named for | Hugh Mercer |
| Capital | Celina |
| Establishment | January 02, 1824 |
| Time Zone | America/New_York |
| Local time | 08:48:31 (23rd September 2026) |
| Density | 34 Pop. per km² as of 2020 |
| Population growth | 1.13% (2010-2020) |
| Weather | 67℉ Chance Rain Showers 7-days weather |
Geography
Mercer County is located at 40°32'24"N 84°37'46"W (40.5400100, -84.6293600). It has 6 neighbors: Adams County, Jay County, Auglaize County, Darke County, Shelby County and Van Wert County.
Mercer County map
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The largest city of Mercer County is Celina with a population of 10,438. Other cities include, Coldwater population 4,562, Saint Henry population 2,574 and Fort Recovery population 1,470. See all Mercer County cities & populated places.
Mercer County Populated Places
Cities, towns, neighborhoods & other populated places in Mercer County.
| City Name | Population | Title |
|---|---|---|
| Celina | 10,438 | City in Ohio, USA |
| Coldwater | 4,562 | Town |
| Saint Henry | 2,574 | Human settlement in Mercer County, Ohio, United States of America |
| Fort Recovery | 1,470 | Village in Ohio, USA |
Weather
A chance of rain showers. Mostly cloudy, with a high near 67. Chance of precipitation is 50%.
7-Day ForecastOfficial website of Mercer County
Official Website- Celina
Demographics
The population of Mercer County increased by 1.13% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 40,814 | - | census |
| 2011 | 40,715 | -0.24% | estimation process |
| 2012 | 40,705 | -0.02% | estimation process |
| 2013 | 40,615 | -0.22% | estimation process |
| 2014 | 40,730 | 0.28% | estimation process |
| 2015 | 40,723 | -0.02% | estimation process |
| 2016 | 40,715 | -0.02% | estimation process |
| 2017 | 40,858 | 0.35% | estimation process |
| 2018 | 40,952 | 0.23% | estimation process |
| 2019 | 41,172 | 0.54% | estimation process |
| 2020 | 41,274 | 0.25% | estimation process |
People born in Mercer County (1)
American baseball player Bruno Betzel 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, 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.
- Mercer County, Missouri county in Missouri, United States. with a population of 3,558 people.
Ohio Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Franklin County | 1,324,624 | County in Massachusetts, United States |
| Cuyahoga County | 1,227,883 | County in Ohio, United States |
| Columbus | 884,356 | The fifteenth most populous city in the United States and the center of the Columbus metropolitan area. |
| Hamilton County | 817,985 | County in New York, United States |
| Summit County | 538,866 | County in northern Utah, United States |
| Montgomery County | 531,610 | County in Ohio, United States |
| Lucas County | 428,294 | County in Ohio, United States |
| Butler County | 385,648 | County in Ohio, United States of America |
| Cleveland | 378,589 | The second most populous city in Ohio and the center of the Cleveland metropolitan area. |
| Stark County | 369,772 | County in Ohio, United States |
| Lorain County | 312,172 | County in Ohio, United States |
| Cincinnati | 304,548 | The third most populous city in Ohio and the center of the Cincinnati metropolitan area. |
| Toledo | 271,455 | The fourth most populous city in Ohio and the center of the Toledo metropolitan area. |
| Warren County | 238,412 | County in New York, United States |
| Lake County | 229,569 | County in Ohio, United States |
| Mahoning County | 226,075 | County in Ohio, United States |