Mercer County is located in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its so ...

Ohio Ohio ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the ...

. As of the 2020 census, the population was 42,528.2020 census
/ref> Its

county seat A county seat is an administrative center, seat of government, or capital city of a county or parish (administrative division), civil parish. The term is in use in five countries: Canada, China, Hungary, Romania, and the United States. An equiva ...

is Celina. The county was created in 1820 and later organized in 1824. It is named for

Hugh Mercer Hugh Mercer (January 16, 1726 – January 12, 1777) was a Scottish brigadier general in the Continental Army during the American Revolutionary War. He fought in the New York and New Jersey campaign and was mortally wounded at the Battle of Pri ...

, an officer in the

American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which Am ...

. Mercer County comprises the

Celina, Ohio Celina ( ) is a city in Mercer County, Ohio, United States, and its county seat. The population was 10,935 at the 2020 census. Located about northwest of Dayton, Celina is situated on the northwestern shores of Grand Lake St. Marys. History ...

Micropolitan Statistical Area

History

Mercer County was created in 1820 from land that had been attached to Darke and Shelby counties. Land south of the Greenville Treaty Line was still part of Darke County. An act establishing and fully organizing Mercer County took place on January 2, 1824. In 1837 Van Wert County was detached and the county line established is the current northern border of Mercer County. In 1839 Celina was established as the

seat A seat is a place to sit. The term may encompass additional features, such as back, armrest, head restraint but may also refer to concentrations of power in a wider sense (i.e " seat (legal entity)"). See disambiguation. Types of seat The ...

of Mercer County; St. Marys was the previous seat. In 1848 the area south of the Greenville Treaty Line to the current southern county line, was attached. When

Auglaize County Auglaize County () is a county in Northwestern Ohio, United States of America . As of the 2020 census, the population was 46,442. Its county seat and largest city is Wapakoneta. Auglaize County comprises the Wapakoneta Micropolitan Statisti ...

was formed, Mercer County's eastern border was moved west with the exception of the area south of the Greenville Treaty Line. This created the sharp point at Mercer County's southeast corner and was the last county line modification. In the mid to late 1800s, Mercer County became home to many German immigrant farming families. Many of these

German American German Americans (, ) are Americans who have full or partial German ancestry. According to the United States Census Bureau's figures from 2022, German Americans make up roughly 41 million people in the US, which is approximately 12% of the pop ...

s had immigrated from northwestern Germany.

Geography

According to the

U.S. Census Bureau The United States Census Bureau, officially the Bureau of the Census, is a principal agency of the U.S. federal statistical system, responsible for producing data about the American people and economy. The U.S. Census Bureau is part of the U ...

, the county has a total area of , of which is land and (2.3%) is water. The entire county has an elevation difference of less than 300 feet. The highest point is on the southern county line at 1071 feet above sea level. This is in proximity to the head waters for the

Wabash River The Wabash River () is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed May 13, 2011 river that drains most of the state of Indiana, and a significant part of Illinois, in the United ...

. The lowest point in the county is 780 feet above sea level. This point is located on the northern county line where the St. Marys River crosses over.

Drainage basins

Mercer County has two rivers running through it; the Wabash and the St. Marys. The Wabash watershed is part of the

Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...

's watershed. The St. Marys watershed is part of

Lake Erie Lake Erie ( ) is the fourth-largest lake by surface area of the five Great Lakes in North America and the eleventh-largest globally. It is the southernmost, shallowest, and smallest by volume of the Great Lakes and also has the shortest avera ...

's watershed. Creeks between these two watersheds are within a mile of each other at some places in Mercer County. The summit line that divides the

drainage basin A drainage basin is an area of land in which all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...

s is known as the St. Lawrence Continental Divide

Beaver Creek

Beaver Creek is the longest and largest creek in Mercer County. It stretches 19.7 miles and has two sections. The first section begins in southern farmland in the county and flows through the town of Montezuma, Ohio and into Grand Lake St. Marys. The other section of the creek begins as a

spillway A spillway is a structure used to provide the controlled release of water downstream from a dam or levee, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure tha ...

and empties into the Wabash River. Beaver Creek was originally one piece, but was split into two sections after the construction of Grand Lake. The creeks' spillway, and last section, has been the subject of controversy and multimillion-dollar lawsuits. Farmers along Beaver Creek claim their land floods because of the spillway that was put up in 1997, replacing the previous spillway, built in 1913.

Government

Mercer County has a 3-member Board of County Commissioners that oversee the various County departments, similar to all but 2 of the 88 Ohio counties. Mercer County's elected commissioners are: Jerry Laffin, Rick Muhlenkamp, and David Buschur.

Adjacent counties

Adams County, Indiana Adams County lies in northeastern Indiana in the United States and shares its eastern border with Ohio. It was officially established in 1836. The county seat is Decatur. According to the 2020 census, its population was 35,809, an increase of ...

(northwest) * Van Wert County (north) *

(east) * Shelby County (southeast) * Darke County (south) *

Jay County, Indiana Jay County is a county in the U.S. state of Indiana. As of 2020, the population was 20,478. The county seat is Portland. History The Indiana State Legislature passed an omnibus county bill on February 7, 1835 that authorized the creation o ...

(southwest)

Demographics

2000 census

As of the

census A census (from Latin ''censere'', 'to assess') is the procedure of systematically acquiring, recording, and calculating population information about the members of a given Statistical population, population, usually displayed in the form of stati ...

of 2010, there were 40,814 people, 14,756 households, and 11,022 families living in the county. The population density was . There were 15,875 housing units at an average density of . The racial makeup of the county was 98.44%

White White is the lightest color and is achromatic (having no chroma). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully (or almost fully) reflect and scatter all the visible wa ...

, 0.10%

Black Black is a color that results from the absence or complete absorption of visible light. It is an achromatic color, without chroma, like white and grey. It is often used symbolically or figuratively to represent darkness.Eva Heller, ''P ...

African American African Americans, also known as Black Americans and formerly also called Afro-Americans, are an Race and ethnicity in the United States, American racial and ethnic group that consists of Americans who have total or partial ancestry from an ...

, 0.26% Native American, 0.29% Asian, 0.02%

Pacific Islander Pacific Islanders, Pasifika, Pasefika, Pacificans, or rarely Pacificers are the peoples of the list of islands in the Pacific Ocean, Pacific Islands. As an ethnic group, ethnic/race (human categorization), racial term, it is used to describe th ...

, 0.34% from other races, and 0.56% from two or more races. 1.15% of the population were

Hispanic The term Hispanic () are people, Spanish culture, cultures, or countries related to Spain, the Spanish language, or broadly. In some contexts, Hispanic and Latino Americans, especially within the United States, "Hispanic" is used as an Ethnici ...

or Latino of any race. There were 14,756 households, out of which 37.10% had children under the age of 18 living with them, 64.10% were

married couples Marriage, also called matrimony or wedlock, is a culturally and often legally recognised union between people called spouses. It establishes rights and obligations between them, as well as between them and their children (if any), and b ...

living together, 7.40% had a female householder with no husband present, and 25.30% were non-families. 22.70% of all households were made up of individuals, and 10.80% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 3.24. In the county, the population was spread out, with 29.60% under the age of 18, 7.90% from 18 to 24, 26.70% from 25 to 44, 21.20% from 45 to 64, and 14.50% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 99.80 males. For every 100 females age 18 and over, there were 96.20 males. The median income for a household in the county was $42,742, and the median income for a family was $50,157. Males had a median income of $35,508 versus $22,857 for females. The

per capita income Per capita income (PCI) or average income measures the average income earned per person in a given area (city, region, country, etc.) in a specified year. In many countries, per capita income is determined using regular population surveys, such ...

for the county was $18,531. About 4.60% of families and 6.40% of the population were below the

poverty line The poverty threshold, poverty limit, poverty line, or breadline is the minimum level of income deemed adequate in a particular country. The poverty line is usually calculated by estimating the total cost of one year's worth of necessities for ...

, including 6.90% of those under age 18 and 7.80% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 40,814 people, 15,532 households, and 11,172 families living in the county. The population density was . There were 17,633 housing units at an average density of . The racial makeup of the county was 97.4% white, 0.4% Asian, 0.2% Pacific islander, 0.2% American Indian, 0.2% black or African American, 0.6% from other races, and 0.9% from two or more races. Those of Hispanic or Latino origin made up 1.5% of the population. In terms of ancestry, 58.7% were

German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...

, 8.8% were American, 8.3% were Irish, and 6.2% were English. Of the 15,532 households, 32.6% had children under the age of 18 living with them, 60.1% were married couples living together, 7.6% had a female householder with no husband present, 28.1% were non-families, and 24.5% of all households were made up of individuals. The average household size was 2.60 and the average family size was 3.11. The median age was 39.4 years. The median income for a household in the county was $49,719 and the median income for a family was $60,215. Males had a median income of $42,441 versus $31,069 for females. The per capita income for the county was $22,348. About 6.3% of families and 8.3% of the population were below the

, including 8.9% of those under age 18 and 7.7% of those age 65 or over.

Politics

Prior to 1940, Mercer County was primarily Democratic, only voting Republican once from 1856 to 1936 for Ohioan

Warren G. Harding Warren Gamaliel Harding (November 2, 1865 – August 2, 1923) was the 29th president of the United States, serving from 1921 until his death in 1923. A member of the Republican Party (United States), Republican Party, he was one of the most ...

in 1920. From 1940 to 1968, the county was a Republican-leaning swing county, voting for Republican candidates four times and Democratic candidates three times, although

John F. Kennedy John Fitzgerald Kennedy (May 29, 1917 – November 22, 1963), also known as JFK, was the 35th president of the United States, serving from 1961 until his assassination in 1963. He was the first Roman Catholic and youngest person elected p ...

came within 5 votes of carrying it in 1960. The 1972 election began the county's streak of being a Republican stronghold presidentially, with the party's margins of victory increasing to well over 50 percent in recent elections.

Communities

City

* Celina (county seat)

Villages

* Burkettsville (part) *

Chickasaw The Chickasaw ( ) are an Indigenous people of the Southeastern Woodlands, United States. Their traditional territory was in northern Mississippi, northwestern and northern Alabama, western Tennessee and southwestern Kentucky. Their language is ...

* Coldwater * Fort Recovery * Mendon * Montezuma * Rockford * St. Henry

Townships

* Black Creek *

Butler A butler is a person who works in a house serving and is a domestic worker in a large household. In great houses, the household is sometimes divided into departments, with the butler in charge of the dining room, wine cellar, and pantries, pantr ...

* Center *

Dublin Dublin is the capital and largest city of Republic of Ireland, Ireland. Situated on Dublin Bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, and is bordered on the south by the Dublin Mountains, pa ...

* Franklin * Gibson * Granville * Hopewell * Jefferson *

Liberty Liberty is the state of being free within society from oppressive restrictions imposed by authority on one's way of life, behavior, or political views. The concept of liberty can vary depending on perspective and context. In the Constitutional ...

* Marion * Recovery * Union *

Washington Washington most commonly refers to: * George Washington (1732–1799), the first president of the United States * Washington (state), a state in the Pacific Northwest of the United States * Washington, D.C., the capital of the United States ** A ...

* Wayne (defunct, now part of Celina)

Unincorporated communities

* Carthagena * Cassella *

Chattanooga Chattanooga ( ) is a city in Hamilton County, Tennessee, United States, and its county seat. It is located along the Tennessee River and borders Georgia (U.S. state), Georgia to the south. With a population of 181,099 in 2020, it is Tennessee ...

* Cranberry Prairie * Erastus *

Macedon Macedonia ( ; , ), also called Macedon ( ), was an ancient kingdom on the periphery of Archaic and Classical Greece, which later became the dominant state of Hellenistic Greece. The kingdom was founded and initially ruled by the royal ...

* Maria Stein * Mercer *

Padua Padua ( ) is a city and ''comune'' (municipality) in Veneto, northern Italy, and the capital of the province of Padua. The city lies on the banks of the river Bacchiglione, west of Venice and southeast of Vicenza, and has a population of 20 ...

* Sebastian

In popular culture

The county is the fictional setting of the

Amazon Prime Video Amazon Prime Video, known simply as Prime Video, is an American subscription video on-demand over-the-top streaming television service owned by Amazon. The service primarily distributes films and television series produced or co-produced by ...

series '' Tales from the Loop''.

References

External links

County website

Mercer County, Ohio American History and Genealogy Project
{{authority control 1824 establishments in Ohio Populated places established in 1824