County · Ohio

Union County, Ohio

Union County, Ohio. Union County had 73,446 residents in 2025 by the Census Bureau's estimate, up 17.0% since 2020, faster than Ohio (+0.9%). It holds 24 places (7 cities, villages and boroughs, 15 towns and townships and 2 census-designated) and 13 census tracts. GEOID 39159.

Union County is one of the 10 counties of the Columbus, OH metropolitan statistical area (the Census Bureau's July 2023 delineation).

Residents, July 2025 estimate

73,446

Census Bureau estimate (no margin published)
2020 Census count: 62,784 · ACS 2020-2024: 67,324

Median household income

$112,322

±$3,644 (90% margin)
Ohio: $71,389

Median home value

$344,900

±$11,197 (90% margin)
Ohio: $214,800

Median gross rent

$1,247

±$62 (90% margin)
Ohio: $1,034

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

The 2020 Census counted 62,784 residents in Union County. The Census Bureau estimates 73,446 for July 1, 2025, up 17.0% since 2020, faster than Ohio (+0.9%). The 2020-2024 American Community Survey puts the population at 67,324 over 432 square miles of land.

July 2020→2021 +2,032 (65,101)
2021→2022 +1,841 (66,942)
2022→2023 +2,888 (69,830)
2023→2024 +2,153 (71,983)
2024→2025 +1,463 (73,446)

Union County in Ohio. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	Union County	Ohio	Change since 2015-2019
Total population	67,324	11,810,293	+10,617
Households	24,232±268	4,863,191	+4,020
Average household size	2.67±0.03	2.37	no clear change
Housing units	25,158±72	5,292,391	+3,900

Union County's population since 2000

From 40,909 in 2000 to 73,446 in 2025: up 79.5%. 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 40,909
2005 (estimate) 46,952
2010 Census 52,300
2015 (estimate) 54,394
2020 Census 62,784
2025 (estimate) 73,446

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 Union County?

Union County holds 24 places: 7 cities, villages and boroughs (incorporated places), 15 towns and townships (county subdivisions with their own government) and 2 census-designated places. The largest is Paris Township, Union County with 32,021 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 Union County, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Paris Township, Union County	township	27,167	29,129±34	$92,127	$303,100	6.6%	100%
Marysville	city	25,571	27,518±373	$92,619	$300,800	6.7%	100%
Jerome Township	township	9,504	10,270±42	$175,797	$592,300	0.4%	100%
Dublin	city	49,328	49,294±83	$160,296	$563,500	3.2%	9%
Washington Township, Union County (code 81242)	township	4,344	4,348±16	$235,561	$652,900	0.0%	100%
Claibourne Township	township	3,481	3,760±42	$66,163	$210,100	9.8%	100%
Darby Township, Union County	township	2,397	2,586±19	$134,773	$427,000	1.6%	100%
Allen Township, Union County	township	2,365	2,597±17	$138,971	$350,600	7.5%	100%
Dover Township, Union County	township	2,326	2,546±14	$94,760	$260,600	3.2%	100%
New CaliforniaGEOID 3954320	CDP	2,225	1,672±437	$161,908	$464,500	0.0%	100%
Richwood	village	2,222	2,332±327	$64,007	$180,300	13.1%	100%
Liberty Township, Union County	township	2,048	2,232±448	$113,472	$328,100	9.5%	100%
Union Township, Union County	township	1,710	1,538±281	$108,438	$243,000	1.6%	100%
Taylor Township	township	1,516	1,503±370	$102,083	$365,800	4.5%	100%
Leesburg Township	township	1,487	2,096±461	$101,797	$273,000	8.4%	100%
York Township, Union CountyGEOID 3915987122	township	1,341	1,254±337	$80,833	$244,000	18.7%	100%
Millcreek TownshipGEOID 3915950288	township	1,332	1,704±558	$151,434	$359,100	2.3%	100%
Jackson Township, Union CountyGEOID 3915938108	township	954	959±274	$92,625	$318,000	0.0%	100%
Washington Township, Union County (code 81662)GEOID 3915981662	township	812	802±315	$106,016	$226,600	0.0%	100%
Milford Center	village	807	770±214	$93,125	$197,100	2.5%	100%
Plain City	village	4,065	3,829±430	$117,972	$368,500	3.5%	18%
RaymondGEOID 3965676	CDP	280	415±298	$118,950	$325,800	27.7%	100%
Magnetic Springs	village	267	359±119	$77,813	$137,500	17.8%	100%
Unionville CenterGEOID 3978834	village	241	269±173	$104,545	$182,500	3.7%	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 Union County?

The median resident of Union County is 38.5 years old; 24.1% are under 18 and 13.2% are 65 or older. The largest group is non-Hispanic white residents at 84.5%, then non-Hispanic Asian residents at 5.0%. 6.2% 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	Union County	Ohio	Change since 2015-2019
Median age	38.5±0.6	39.7	no clear change
Under 18 years	24.1%	22.0%	–
65 years and over	13.2%±0.1 pts	18.3%	–
Hispanic or Latino (any race)	3.4%	4.8%	+1.7 pts
White alone, not Hispanic	84.5%±0.5 pts	75.8%	−5.0 pts
Black or African American alone, not Hispanic	2.3%±0.5 pts	12.0%	no clear change
Asian alone, not Hispanic	5.0%±0.4 pts	2.5%	+1.0 pts
American Indian and Alaska Native alone, not Hispanic	0.1%±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	4.2%±0.7 pts	4.3%	–
Some other race alone, not Hispanic	0.5%±0.3 pts	0.4%	–
Born outside the United States	6.2%±0.7 pts	5.2%	+1.8 pts
Speak a language other than English at home (age 5+)	7.9%±0.9 pts	8.0%	–
Civilian veterans (age 18+)	5.6%±0.7 pts	6.6%	–
With a disability	10.5%±1.0 pts	14.4%	–
No health insurance coverage	3.8%±0.8 pts	6.4%	no clear change
High school graduate or higher (age 25+)	95.8%±0.6 pts	91.8%	–
Bachelor's degree or higher (age 25+)	39.2%±2.1 pts	31.5%	+3.7 pts
Graduate or professional degree (age 25+)	13.7%±1.2 pts	12.2%	–
Moved from another state in the past year	2.0%±0.7 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 Union County earn?

Half of Union County's 24,232 households earn less than $112,322 a year (±$3,644), against $71,389 in Ohio. In 2015-2019 the median was $106,720 in 2024 dollars, so it rose by $5,602 after inflation. 5.0% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Union County	Ohio	Change since 2015-2019
Median household income	$112,322±$3,644	$71,389	+$5,602
Mean household income	$137,663±$5,606	$96,990	–
Per capita income	$50,711±$1,783	$40,552	+$4,703
People below the poverty line	5.0%±1.0 pts	13.3%	no clear change
Children under 18 below the poverty line	4.0%±1.6 pts	17.8%	no clear change
Households receiving SNAP	4.9%±1.0 pts	12.5%	–
Households with a broadband subscription	95.2%±1.0 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 Union County?

Owners occupy 79.2% of Union County's occupied homes and renters 20.8%. The median owner-occupied home is valued at $344,900 by its owner (±$11,197). The median renter pays $1,247 a month including utilities, and 26.7% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	Union County	Ohio	Change since 2015-2019
Median home value (owner-occupied)	$344,900±$11,197	$214,800	+$94,085
Median gross rent	$1,247±$62	$1,034	no clear change
Renters paying 35% or more of income on rent	26.7%±5.7 pts	37.3%	no clear change
Median monthly owner costs, with a mortgage	$1,968±$64	$1,517	–
Owner-occupied homes	79.2%±1.8 pts	67.2%	no clear change
Housing units	25,158±72	5,292,391	+3,900
Homeowner vacancy rate	0.0%±0.2 pts	0.8%	–
Rental vacancy rate	1.1%±1.2 pts	4.4%	–
Single-family detached homes	80.1%±1.9 pts	68.8%	–
Mobile homes	3.8%±0.9 pts	3.4%	–
Built 2020 or later	5.7%±1.0 pts	1.1%	–
Built 1939 or earlier	14.8%±1.3 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 Union County building?

Builders took permits for 968 new housing units across Union County in 2025 (595 single-family), 13.2 per 1,000 residents.

2019 567 units
2020 854 units
2021 1,253 units
2022 816 units
2023 848 units
2024 1,498 units
2025 968 units

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

How do people in Union County get to work?

70.0% of Union County's workers drive alone and 21.6% work from home. The average trip to work takes 26.0 minutes. The unemployment rate in 2020-2024 averaged 2.6%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Union County	Ohio	Change since 2015-2019
In the labor force (age 16+)	68.4%±1.2 pts	63.1%	–
Unemployment rate	2.6%±0.6 pts	4.8%	no clear change
Drove alone to work	70.0%±2.3 pts	75.1%	–
Carpooled	5.9%±0.9 pts	7.5%	–
Public transportation	0.7%±0.5 pts	1.0%	–
Walked	0.5%±0.2 pts	2.0%	–
Worked from home	21.6%±2.1 pts	13.0%	+16.1 pts
Mean travel time to work	26.0 min±1.2	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 Union County's census tracts?

Union County is divided into 13 census tracts. Among those with a reliable estimate, median household income runs from $62,820 (Tract 505.02) to $196,731 (Tract 506.01).

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

Tract 50139159050100	Richwood (5%)	3,769	3,939±425	$81,364	$237,700	$991	5.2%
Tract 50239159050200	Richwood (8%)	4,875	5,310±451	$86,983	$241,100	$871	11.4%
Tract 503.0139159050301	Marysville (5%)	4,034	4,324±376	$131,735	$367,700	$1,358	8.5%
Tract 503.0339159050303	Marysville (61%)	8,423	9,288±799	$121,078	$344,000	$1,290	4.5%
Tract 503.0439159050304	–	2,557	2,900±300	$94,702	$313,500	not published	3.0%
Tract 504.0139159050401	Marysville (94%)	5,477	5,315±441	$101,115	$279,000	$1,439	3.8%
Tract 504.0239159050402	Marysville (99%)	3,630	3,804±569	$86,444	$256,600	$1,264	6.0%
Tract 505.0139159050501	Marysville (85%)	4,613	5,565±499	$78,724	$355,200	$1,176	9.5%
Tract 505.0239159050502	Marysville (89%)	2,249	2,415±338	$62,820	$228,300	$1,111	13.5%
Tract 506.0139159050601	Dublin (29%)	10,920	11,920±423	$196,731	$665,200	$2,137	0.2%
Tract 506.0239159050602	Marysville (21%)	4,012	4,652±620	$103,036	$291,000	$1,410	4.1%
Tract 507.0139159050701	Marysville (11%)	4,848	4,748±459	$153,750	$434,200	$1,661	0.9%
Tract 507.0239159050702	Milford Center (9%)	3,377	3,144±355	$98,966	$277,800	$1,088	3.7%

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

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

Union County's rank among Ohio's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	36th of 88
Growth 2020-2025	1st of 88
Residents per square mile	34th of 88
Median household income	2nd of 88
Median home value	3rd of 88
Median gross rent	4th of 88
Poverty rate	87th of 88
Bachelor's degree or higher	7th of 88
Median age	80th 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 Union 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.