Seneca County, Ohio Demographics 2026

Name: Seneca County, Ohio Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Seneca County, Ohio has a population of 54,770, the 47th most populous county in Ohio. The median household income is $66,025 and the median home value is $154,700. The poverty rate is 11.9%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Seneca County Quick Facts

Population 54,770

Median Household Income $66,025

Median Home Value $154,700

Poverty Rate 11.9%

Unemployment Rate 3.6%

Median Age 40.2 years

Homeownership Rate 73.4%

Affordability Ratio 2.3x

Bachelor's Degree+ 20.6%

High School Graduation 93.3%

Cities/Places 13

Population 54,770 47th of 88

Median Income $66,025 8% lower than state

Poverty Rate 11.9%

Unemployment 3.6%

How Seneca County Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	54,861	54,770	-0.2%
Median household income	$65,020	$66,025	+1.5%
Median home value	$136,200	$154,700	+13.6%

Median Household Income

Seneca

$66,025

$71,389

National

$80,734

Median Home Value

Seneca

$154,700

$214,800

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 16.4%

$25K-$50K 20.9%

$50K-$100K 34.5%

$100K+ 28.2%

Detailed income brackets

Under $10K

4.0%

$10K-$15K

3.8%

$15K-$20K

4.7%

$20K-$25K

3.9%

$25K-$30K

5.0%

$30K-$35K

3.7%

$35K-$40K

3.4%

$40K-$45K

4.9%

$45K-$50K

4.0%

$50K-$60K

7.1%

$60K-$75K

11.9%

$75K-$100K

15.5%

$100K-$125K

10.1%

$125K-$150K

7.8%

$150K-$200K

5.4%

$200K+

4.9%

Employment

3.6% Unemployment Rate State: 4.8%|National: 5.2%

61.5% Labor Force Participation

Housing Overview

Owner 73.4%

Renter 26.6%

Affordability Index Very Affordable

2.3x home value to income ratio

Median gross rent $856/mo 15.6% of median household income annually

People & Demographics

Age Distribution

Under 18

21.4%

18-34

22.8%

35-54

23.1%

55-74

25.2%

75+

7.5%

Race & Ethnicity

Diversity Index

Very Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 41 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in Seneca County

City	Population	Median Income	Poverty	Home Value
Tiffin	17,818	$56,198	14.8%	$142,200
Attica	755	$69,063	10.2%	$113,800
Bloomville	721	$69,000	17.0%	$96,800
Bettsville	562	$65,417	14.7%	$99,900
Republic	456	$63,125	10.3%	$85,000
McCutchenville	346	$83,393	0.0%	$154,200
Flat Rock	340	N/A	24.7%	$92,500
New Riegel	316	$63,750	15.2%	$119,000
Bascom	298	$90,592	0.0%	$145,500
Kansas	200	$53,144	40.0%	$73,800
Fort Seneca	113	$39,375	0.0%	$204,700
Melmore	112	$69,018	8.9%	N/A
Old Fort	81	N/A	0.0%	N/A

Explore Ohio Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

Seneca County is located in Ohio with a total population of 54,770. It is the 47th most populous county out of 88 in Ohio. The county encompasses 13 Census-designated places.

Age Demographics

The median age in Seneca County is 40.2 years. This is 1% higher than the state median of 39.7 years.

Economy, Income & Housing

The median household income in Seneca County is $66,025. This is 8% lower than the state median of $71,389. It is also 18% lower than the national median of $80,734. The poverty rate stands at 11.9%. This is 10% lower than the state poverty rate of 13.3%. The unemployment rate is 3.6%. This is 25% lower than the state rate of 4.8%. The median home value is $154,700. Housing costs are 28% lower than the state median of $214,800. With a home-value-to-income ratio of just 2.3x, Seneca County is one of the most affordable housing markets in the area. 73.4% of occupied housing units are owner-occupied. This homeownership rate is 9% higher than the state average of 67.2%.

Race & Ethnicity

Seneca County has a predominantly White (non-Hispanic) population, comprising 87.8% of all residents. Hispanic or Latino residents account for 5.7%. The Black or African American population (2.4%) is well below the state average of 12.0%. The Asian population (0.5%) is well below the state average of 2.5%.

Education

20.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 35% lower than the state rate of 31.5%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.3%.

Data Sources & Methodology

All figures for Seneca County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, 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 Seneca County, Ohio?

Seneca County has a population of 54,770, making it the 47th most populous county in Ohio.

What is the median income in Seneca County?

The median household income in Seneca County is $66,025 with a poverty rate of 11.9%.

How many cities are in Seneca County, Ohio?

Seneca County contains 13 Census-designated places.