County · Ohio

Marion County, Ohio

Marion County, Ohio. Marion County had 65,115 residents in 2025 by the Census Bureau's estimate, down 0.4% since 2020, while Ohio grew 0.9%. It holds 23 places (8 cities, villages and boroughs and 15 towns and townships) and 18 census tracts. GEOID 39101.

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

Residents, July 2025 estimate

65,115

Census Bureau estimate (no margin published)
2020 Census count: 65,359 · ACS 2020-2024: 65,020

Median household income

$59,371

±$4,308 (90% margin)
Ohio: $71,389

Median home value

$156,800

±$6,246 (90% margin)
Ohio: $214,800

Median gross rent

$864

±$31 (90% margin)
Ohio: $1,034

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

The 2020 Census counted 65,359 residents in Marion County. The Census Bureau estimates 65,115 for July 1, 2025, down 0.4% since 2020, while Ohio grew 0.9%. The 2020-2024 American Community Survey puts the population at 65,020 over 404 square miles of land.

July 2020→2021 −100 (65,285)
2021→2022 −747 (64,538)
2022→2023 +230 (64,768)
2023→2024 +109 (64,877)
2024→2025 +238 (65,115)

Marion County in Ohio. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	Marion County	Ohio	Change since 2015-2019
Total population	65,020	11,810,293	−279
Households	24,683±368	4,863,191	no clear change
Average household size	2.41±0.04	2.37	no clear change
Housing units	27,358±60	5,292,391	−530

Marion County's population since 2000

From 66,217 in 2000 to 65,115 in 2025: down 1.7%. 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 66,217
2005 (estimate) 66,468
2010 Census 66,501
2015 (estimate) 65,470
2020 Census 65,359
2025 (estimate) 65,115

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 Marion County?

Marion County holds 23 places: 8 cities, villages and boroughs (incorporated places) and 15 towns and townships (county subdivisions with their own government). The largest is Marion Township, Marion County with 43,499 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 Marion County, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Marion Township, Marion County	township	43,796	43,566±108	$49,743	$127,700	20.4%	100%
Marion	city	35,999	35,669±104	$47,951	$119,500	22.4%	100%
Pleasant Township, Marion County	township	4,939	4,910±22	$96,049	$232,200	10.4%	100%
Claridon Township, Marion County	township	2,777	2,845±34	$78,750	$244,700	12.9%	100%
Montgomery Township, Marion County	township	2,064	2,091±359	$67,669	$111,900	22.8%	100%
Prospect Township	township	2,043	2,143±384	$83,796	$167,400	6.6%	100%
Richland Township, Marion CountyGEOID 3910166754	township	1,784	1,936±535	$111,875	$284,500	9.3%	100%
Grand Prairie TownshipGEOID 3910131192	township	1,586	1,051±379	$94,517	$172,100	1.3%	100%
Big Island TownshipGEOID 3910106348	township	1,174	867±269	$43,750	$219,500	0.0%	100%
Waldo Township	township	1,130	1,235±338	$90,114	$181,300	4.5%	100%
Green Camp TownshipGEOID 3910131962	township	1,080	1,726±540	$102,833	$234,000	1.2%	100%
Prospect	village	1,067	1,157±268	$70,833	$164,100	11.5%	100%
Tully Township, Marion CountyGEOID 3910177742	township	834	581±276	not published	not published	41.7%	100%
La Rue	village	676	725±194	$75,156	$113,600	10.6%	100%
Salt Rock TownshipGEOID 3910170240	township	605	865±267	$83,000	$160,300	6.5%	100%
Bowling Green Township, Marion CountyGEOID 3910107958	township	603	356±155	$62,841	$218,200	5.9%	100%
Scott Township, Marion CountyGEOID 3910171073	township	571	158±128	not published	$225,000	2.5%	100%
CaledoniaGEOID 3910954	village	560	421±144	$69,792	$120,100	18.9%	100%
New BloomingtonGEOID 3954152	village	413	430±210	$25,250	not published	65.1%	100%
MorralGEOID 3952276	village	373	423±164	$51,563	$119,000	13.6%	100%
Grand TownshipGEOID 3910131178	township	373	690±416	$71,250	not published	4.6%	100%
Waldo	village	326	370±154	$64,519	$150,000	2.2%	100%
Green Camp	village	310	437±156	$56,250	$123,300	4.9%	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 Marion County?

The median resident of Marion County is 40.1 years old; 21.3% are under 18 and 18.7% are 65 or older. The largest group is non-Hispanic white residents at 86.3%, then non-Hispanic Black residents at 4.7%. 1.5% 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	Marion County	Ohio	Change since 2015-2019
Median age	40.1±0.5	39.7	−1.2
Under 18 years	21.3%±0.1 pts	22.0%	–
65 years and over	18.7%±0.2 pts	18.3%	–
Hispanic or Latino (any race)	3.2%	4.8%	+0.5 pts
White alone, not Hispanic	86.3%±0.4 pts	75.8%	−2.0 pts
Black or African American alone, not Hispanic	4.7%±0.5 pts	12.0%	−0.7 pts
Asian alone, not Hispanic	0.6%±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	4.6%±0.6 pts	4.3%	–
Some other race alone, not Hispanic	0.6%±0.3 pts	0.4%	–
Born outside the United States	1.5%±0.4 pts	5.2%	no clear change
Speak a language other than English at home (age 5+)	3.8%±0.7 pts	8.0%	–
Civilian veterans (age 18+)	7.9%±0.8 pts	6.6%	–
With a disability	17.2%±1.3 pts	14.4%	–
No health insurance coverage	5.4%±0.8 pts	6.4%	no clear change
High school graduate or higher (age 25+)	89.3%±1.2 pts	91.8%	–
Bachelor's degree or higher (age 25+)	14.7%±1.2 pts	31.5%	+2.2 pts
Graduate or professional degree (age 25+)	5.1%±0.7 pts	12.2%	–
Moved from another state in the past year	0.4%±0.3 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 Marion County earn?

Half of Marion County's 24,683 households earn less than $59,371 a year (±$4,308), against $71,389 in Ohio. In 2015-2019 it was $58,456 in 2024 dollars; the margins of error cannot tell the two periods apart. 16.6% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Marion County	Ohio	Change since 2015-2019
Median household income	$59,371±$4,308	$71,389	no clear change
Mean household income	$76,923±$3,366	$96,990	–
Per capita income	$30,260±$1,306	$40,552	no clear change
People below the poverty line	16.6%±1.9 pts	13.3%	no clear change
Children under 18 below the poverty line	21.7%±4.2 pts	17.8%	no clear change
Households receiving SNAP	17.0%±2.0 pts	12.5%	–
Households with a broadband subscription	86.8%±1.8 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 Marion County?

Owners occupy 67.5% of Marion County's occupied homes and renters 32.5%. The median owner-occupied home is valued at $156,800 by its owner (±$6,246). The median renter pays $864 a month including utilities, and 39.5% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	Marion County	Ohio	Change since 2015-2019
Median home value (owner-occupied)	$156,800±$6,246	$214,800	+$32,746
Median gross rent	$864±$31	$1,034	no clear change
Renters paying 35% or more of income on rent	39.5%±4.0 pts	37.3%	no clear change
Median monthly owner costs, with a mortgage	$1,259±$56	$1,517	–
Owner-occupied homes	67.5%±2.1 pts	67.2%	no clear change
Housing units	27,358±60	5,292,391	−530
Homeowner vacancy rate	0.8%±0.7 pts	0.8%	–
Rental vacancy rate	3.7%±2.0 pts	4.4%	–
Single-family detached homes	75.9%±2.0 pts	68.8%	–
Mobile homes	4.6%±1.1 pts	3.4%	–
Built 2020 or later	0.5%±0.3 pts	1.1%	–
Built 1939 or earlier	28.7%±2.0 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 Marion County building?

Builders took permits for 60 new housing units across Marion County in 2025 (60 single-family), 0.9 per 1,000 residents.

2019 37 units
2020 49 units
2021 49 units
2022 35 units
2023 52 units
2024 41 units
2025 60 units

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

How do people in Marion County get to work?

82.3% of Marion County's workers drive alone and 6.2% work from home. The average trip to work takes 24.5 minutes. The unemployment rate in 2020-2024 averaged 6.3%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Marion County	Ohio	Change since 2015-2019
In the labor force (age 16+)	53.2%±1.4 pts	63.1%	–
Unemployment rate	6.3%±1.2 pts	4.8%	no clear change
Drove alone to work	82.3%±2.0 pts	75.1%	–
Carpooled	8.6%±1.6 pts	7.5%	–
Public transportation	0.7%±0.4 pts	1.0%	–
Walked	0.9%±0.4 pts	2.0%	–
Worked from home	6.2%±1.1 pts	13.0%	+2.9 pts
Mean travel time to work	24.5 min±1.9	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 Marion County's census tracts?

Marion County is divided into 18 census tracts. Among those with a reliable estimate, median household income runs from $30,541 (Tract 9) to $90,983 (Tract 105).

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

Tract 139101000100	Marion	1,153	871±360	$46,202	$85,500	$673	20.3%
Tract 239101000200	Marion (87%)	2,958	2,540±550	$40,340	$79,400	$829	22.7%
Tract 339101000300	Marion (92%)	2,118	2,010±330	$33,910	$80,700	$900	37.5%
Tract 439101000400	Marion (79%)	3,674	3,539±480	$56,970	$110,500	$965	18.7%
Tract 5.0139101000501	Marion	2,644	2,891±640	$56,188	$96,100	$989	13.8%
Tract 5.0239101000502	Marion	2,600	2,754±509	$65,357	$125,100	$735	17.8%
Tract 639101000600	Marion (86%)	4,648	4,774±700	$62,708	$232,800	$782	12.1%
Tract 739101000700	Marion	2,675	2,627±409	$54,519	$136,400	$855	12.0%
Tract 839101000800	Marion	2,400	2,497±384	$41,635	$98,200	$937	24.5%
Tract 939101000900	Marion (89%)	4,254	4,117±579	$30,541	$91,900	$881	43.9%
Tract 1039101001000	Marion (10%)	3,155	3,618±505	$60,893	$207,400	$822	11.9%
Tract 1139101001100	Marion (89%)	2,403	2,549±303	$46,333	$113,600	$967	21.4%
Tract 10139101010100	Caledonia (15%)	5,294	4,629±444	$69,375	$211,800	$971	15.3%
Tract 102.0139101010201	Morral (8%)	5,222	5,418±485	$72,400	$168,500	$919	5.1%
Tract 102.0239101010202	Marion (83%)	4,975	4,773±111	not published	not published	not published	0.0%
Tract 10339101010300	La Rue (12%)	4,902	4,889±486	$70,790	$162,000	$777	11.1%
Tract 10439101010400	Marion (13%)	4,949	4,919±454	$69,900	$219,500	$734	12.8%
Tract 10539101010500	Prospect (19%)	5,335	5,605±527	$90,983	$244,100	$933	9.0%

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

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

Marion County's rank among Ohio's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	38th of 88
Growth 2020-2025	50th of 88
Residents per square mile	31st of 88
Median household income	67th of 88
Median home value	67th of 88
Median gross rent	42nd of 88
Poverty rate	15th of 88
Bachelor's degree or higher	79th of 88
Median age	64th 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 Marion 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.