County · Ohio

Mercer County, Ohio

Mercer County, Ohio. Mercer County had 42,737 residents in 2025 by the Census Bureau's estimate, up 0.5% since 2020, in line with Ohio (+0.9%). It holds 24 places (9 cities, villages and boroughs, 14 towns and townships and 1 census-designated) and 9 census tracts. GEOID 39107.

Mercer County is the county of the Celina, OH micropolitan statistical area (the Census Bureau's July 2023 delineation).

Residents, July 2025 estimate

42,737

Census Bureau estimate (no margin published)
2020 Census count: 42,528 · ACS 2020-2024: 42,484

Median household income

$76,782

±$4,484 (90% margin)
Ohio: $71,389

Median home value

$210,600

±$9,217 (90% margin)
Ohio: $214,800

Median gross rent

$804

±$57 (90% margin)
Ohio: $1,034

How many people live in Mercer County, and is it growing?

The 2020 Census counted 42,528 residents in Mercer County. The Census Bureau estimates 42,737 for July 1, 2025, up 0.5% since 2020, in line with Ohio (+0.9%). The 2020-2024 American Community Survey puts the population at 42,484 over 462 square miles of land.

July 2020→2021 −168 (42,366)
2021→2022 −23 (42,343)
2022→2023 +17 (42,360)
2023→2024 +160 (42,520)
2024→2025 +217 (42,737)

Mercer County in Ohio. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	Mercer County	Ohio	Change since 2015-2019
Total population	42,484	11,810,293	+1,600
Households	16,408±243	4,863,191	no clear change
Average household size	2.56±0.04	2.37	+0.07
Housing units	18,103±52	5,292,391	no clear change

Mercer County's population since 2000

From 40,924 in 2000 to 42,737 in 2025: up 4.4%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.

2000 Census 40,924
2005 (estimate) 40,967
2010 Census 40,814
2015 (estimate) 40,735
2020 Census 42,528
2025 (estimate) 42,737

Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov

What cities and towns are in Mercer County?

Mercer County holds 24 places: 9 cities, villages and boroughs (incorporated places), 14 towns and townships (county subdivisions with their own government) and 1 census-designated place. The largest is Jefferson Township, Mercer County with 13,804 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.

Places in Mercer County, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Jefferson Township, Mercer County	township	13,802	13,786±25	$70,128	$170,400	11.5%	100%
Celina	city	10,935	10,903±60	$62,849	$164,100	11.4%	100%
Butler Township, Mercer County	township	6,653	6,634±21	$68,657	$250,400	5.0%	100%
Coldwater	village	4,774	4,191±624	$68,009	$232,200	2.4%	100%
Granville Township, Mercer County	township	4,227	4,235±42	$113,355	$295,000	3.4%	100%
Marion Township, Mercer County	township	3,322	3,346±21	$102,422	$307,500	1.3%	100%
St. Henry	village	2,596	2,741±279	$115,653	$287,000	2.8%	100%
Franklin Township, Mercer County	township	2,511	2,539±24	$62,456	$175,900	7.1%	100%
Dublin Township	township	2,132	1,827±296	$64,722	$147,600	8.9%	100%
Gibson Township	township	2,121	2,303±322	$85,648	$224,700	5.0%	100%
Recovery Township	township	1,523	1,857±342	$107,083	$280,800	4.0%	100%
Fort Recovery	village	1,501	1,729±317	$66,563	$162,500	2.7%	100%
Union Township, Mercer County	township	1,330	1,325±290	$45,556	$110,500	15.2%	100%
Washington Township, Mercer CountyGEOID 3910781452	township	1,201	851±268	$96,016	$247,300	6.1%	100%
Center Township, Mercer CountyGEOID 3910712952	township	1,099	1,012±258	$83,036	$217,800	3.0%	100%
Maria SteinGEOID 3947586	CDP	1,067	1,305±262	$94,141	$339,100	0.0%	100%
Rockford	village	1,051	1,008±184	$57,833	$135,400	10.8%	100%
Hopewell Township, Mercer CountyGEOID 3910736344	township	1,024	756±248	$70,833	$246,100	9.3%	100%
Liberty Township, Mercer CountyGEOID 3910743260	township	909	1,070±474	$91,563	$190,300	5.7%	100%
Mendon	village	628	713±186	$66,250	$100,000	8.6%	100%
Black Creek TownshipGEOID 3910706586	township	611	885±314	$102,684	$190,100	6.1%	100%
Chickasaw	village	358	394±117	$101,250	$296,900	1.3%	100%
BurkettsvilleGEOID 3910296	village	272	227±61	$77,917	$207,000	0.4%	75%
MontezumaGEOID 3951674	village	152	117±44	$80,833	$110,900	4.3%	100%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov

Who lives in Mercer County?

The median resident of Mercer County is 39.4 years old; 25.4% are under 18 and 19.2% are 65 or older. The largest group is non-Hispanic white residents at 94.2%, then Hispanic or Latino residents (of any race) at 2.2%. 1.7% of residents were born outside the United States.

Age, origin and education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	Mercer County	Ohio	Change since 2015-2019
Median age	39.4±0.8	39.7	no clear change
Under 18 years	25.4%±0.3 pts	22.0%	–
65 years and over	19.2%±0.2 pts	18.3%	–
Hispanic or Latino (any race)	2.2%	4.8%	+0.3 pts
White alone, not Hispanic	94.2%±0.1 pts	75.8%	−1.2 pts
Black or African American alone, not Hispanic	1.1%±0.5 pts	12.0%	no clear change
Asian alone, not Hispanic	0.5%±0.1 pts	2.5%	no clear change
American Indian and Alaska Native alone, not Hispanic	0.0%±0.1 pts	0.1%	–
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.0%±0.1 pts	0.0%	–
Two or more races, not Hispanic	1.9%±0.5 pts	4.3%	–
Some other race alone, not Hispanic	0.0%±0.1 pts	0.4%	–
Born outside the United States	1.7%±0.7 pts	5.2%	no clear change
Speak a language other than English at home (age 5+)	2.1%±0.6 pts	8.0%	–
Civilian veterans (age 18+)	5.3%±0.8 pts	6.6%	–
With a disability	10.9%±1.0 pts	14.4%	–
No health insurance coverage	3.6%±0.7 pts	6.4%	no clear change
High school graduate or higher (age 25+)	95.2%±1.0 pts	91.8%	–
Bachelor's degree or higher (age 25+)	21.9%±2.1 pts	31.5%	+3.6 pts
Graduate or professional degree (age 25+)	7.9%±1.2 pts	12.2%	–
Moved from another state in the past year	0.3%±0.2 pts	1.6%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov

What do households in Mercer County earn?

Half of Mercer County's 16,408 households earn less than $76,782 a year (±$4,484), against $71,389 in Ohio. In 2015-2019 it was $77,475 in 2024 dollars; the margins of error cannot tell the two periods apart. 7.3% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Mercer County	Ohio	Change since 2015-2019
Median household income	$76,782±$4,484	$71,389	no clear change
Mean household income	$91,265±$4,831	$96,990	–
Per capita income	$35,761±$1,638	$40,552	no clear change
People below the poverty line	7.3%±1.3 pts	13.3%	no clear change
Children under 18 below the poverty line	7.1%±2.2 pts	17.8%	no clear change
Households receiving SNAP	6.8%±1.6 pts	12.5%	–
Households with a broadband subscription	91.5%±1.2 pts	90.1%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What does housing cost in Mercer County?

Owners occupy 79.6% of Mercer County's occupied homes and renters 20.4%. The median owner-occupied home is valued at $210,600 by its owner (±$9,217). The median renter pays $804 a month including utilities, and 25.0% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	Mercer County	Ohio	Change since 2015-2019
Median home value (owner-occupied)	$210,600±$9,217	$214,800	+$21,319
Median gross rent	$804±$57	$1,034	no clear change
Renters paying 35% or more of income on rent	25.0%±6.1 pts	37.3%	no clear change
Median monthly owner costs, with a mortgage	$1,340±$65	$1,517	–
Owner-occupied homes	79.6%±2.2 pts	67.2%	no clear change
Housing units	18,103±52	5,292,391	no clear change
Homeowner vacancy rate	0.9%±0.7 pts	0.8%	–
Rental vacancy rate	3.4%±2.4 pts	4.4%	–
Single-family detached homes	80.7%±2.2 pts	68.8%	–
Mobile homes	6.2%±1.1 pts	3.4%	–
Built 2020 or later	1.7%±1.0 pts	1.1%	–
Built 1939 or earlier	17.8%±1.8 pts	19.0%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov

How many new homes is Mercer County building?

Builders took permits for 83 new housing units across Mercer County in 2025 (81 single-family), 1.9 per 1,000 residents.

2019 60 units
2020 113 units
2021 85 units
2022 82 units
2023 94 units
2024 86 units
2025 83 units

Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey

How do people in Mercer County get to work?

87.3% of Mercer County's workers drive alone and 4.4% work from home. The average trip to work takes 18.5 minutes. The unemployment rate in 2020-2024 averaged 1.6%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Mercer County	Ohio	Change since 2015-2019
In the labor force (age 16+)	67.0%±1.8 pts	63.1%	–
Unemployment rate	1.6%±0.7 pts	4.8%	no clear change
Drove alone to work	87.3%±1.6 pts	75.1%	–
Carpooled	5.6%±1.2 pts	7.5%	–
Public transportation	0.1%±0.1 pts	1.0%	–
Walked	1.7%±0.6 pts	2.0%	–
Worked from home	4.4%±0.9 pts	13.0%	+2.3 pts
Mean travel time to work	18.5 min±0.9	23.4 min	no clear change

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What are Mercer County's census tracts?

Mercer County is divided into 9 census tracts. Among those with a reliable estimate, median household income runs from $60,221 (Tract 9672) to $109,325 (Tract 9679).

Census tracts of Mercer County, ACS 2020-2024 5-year estimates; sort by any column

Tract 967239107967200	Rockford (25%)	3,662	3,386±310	$60,221	$130,000	$813	10.1%
Tract 967339107967300	–	4,383	4,236±406	$80,536	$215,500	$685	7.7%
Tract 967439107967400	Celina (84%)	4,857	4,794±432	$75,185	$145,500	$801	10.5%
Tract 967539107967500	Celina (78%)	5,650	5,834±444	$62,283	$201,000	$812	11.7%
Tract 967639107967600	Celina (60%)	2,929	2,886±336	$73,636	$168,600	$683	12.4%
Tract 967739107967700	Coldwater (62%)	6,453	6,353±161	$69,560	$255,900	$847	3.7%
Tract 967839107967800	Montezuma (17%)	2,185	2,392±192	$62,611	$171,100	$858	6.6%
Tract 967939107967900	St. Henry (18%)	7,333	7,264±255	$109,325	$305,400	$893	2.0%
Tract 968039107968000	Fort Recovery (25%)	5,076	5,339±366	$92,813	$258,900	$801	6.5%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

How does Mercer County compare with Ohio's other counties?

Mercer County's rank among Ohio's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	57th of 88
Growth 2020-2025	31st of 88
Residents per square mile	60th of 88
Median household income	17th of 88
Median home value	26th of 88
Median gross rent	65th of 88
Poverty rate	81st of 88
Bachelor's degree or higher	33rd of 88
Median age	75th of 88

Every county in Ohio

Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections

Not on this page: crime, weather and schools for Mercer County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.