Union County, Ohio Demographics 2026
Union County, Ohio has a population of 65,293, the 37th most populous county in Ohio. The median household income is $109,506 and the median home value is $306,600. The poverty rate is 5.1%.
Union County Quick Facts
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 40 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Union County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Marysville | 26,540 | $92,490 | 7.3% | $271,000 |
| Plain City | 3,712 | $87,018 | 6.0% | $325,400 |
| Richwood | 2,303 | $52,422 | 14.5% | $161,500 |
| New California | 1,810 | $159,188 | 0.0% | $448,300 |
| Milford Center | 893 | $91,667 | 1.5% | $190,200 |
| Raymond | 420 | N/A | 37.9% | $276,500 |
| Magnetic Springs | 326 | $64,500 | 16.5% | $121,300 |
| Unionville Center | 278 | $97,500 | 3.2% | $178,100 |
Explore Ohio Rankings
Population Overview
Union County is located in Ohio with a total population of 65,293. It is the 37th most populous county out of 88 in Ohio. The county encompasses 8 Census-designated places.
Age Demographics
The median age in Union County is 38.1 years. This is 4% lower than the state median of 39.6 years.
Economy, Income & Housing
The median household income in Union County is $109,506. This is 57% higher than the state median of $69,680. It is also 39% higher than the national median of $78,538. The poverty rate stands at 5.1%. This is 62% lower than the state poverty rate of 13.2%. The unemployment rate is 2.4%. This is 51% lower than the state rate of 4.9%. The median home value is $306,600. Housing costs are 54% higher than the state median of $199,200. With a home-value-to-income ratio of just 2.8x, Union County is one of the most affordable housing markets in the area. 79.4% of occupied housing units are owner-occupied. This homeownership rate is 18% higher than the state average of 67.0%.
Race & Ethnicity
Union County has a predominantly White (non-Hispanic) population, comprising 85.9% of all residents. Asian residents account for 4.8%. The Black or African American population (2.4%) is well below the state average of 12.1%. The Asian population is significantly higher than the state average (4.8% vs 2.4%).
Education
39.1% of residents aged 25 and older hold a bachelor's degree or higher. This places Union County in the top 10% of all counties in the state for educational attainment. This is 26% higher than the state rate of 30.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.2%.
Data Sources & Methodology
All figures for Union County come from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023), with comparisons drawn against Ohio and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of Union County, Ohio?
Union County has a population of 65,293, making it the 37th most populous county in Ohio.
What is the median income in Union County?
The median household income in Union County is $109,506 with a poverty rate of 5.1%.
How many cities are in Union County, Ohio?
Union County contains 8 Census-designated places.