Seneca County, OH demographics:
population, income, and more

Total population
54,770
-0.2% year-over-year change
Median household income
$66,025/yr
1.6% year-over-year change
Housing units
23,982
0.1% year-over-year change

Seneca County population

How many people live in Seneca County

Seneca County is home to 54,770 residents, according to the most recent Census data. Gender-wise, 50.2% of Seneca County locals are male, and 49.8% are female.

Total population
54,770
-0.2% year-over-year change
Gender ratio
Male
50.2%
27,484
Female
49.8%
27,286
Value Percent YoY change
Male 27,484 50.2% -0.6%
Female 27,286 49.8% 0.3%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Seneca County is 40, with the population distributed as follows: about 17.3% are children under 15, then 14.8% are in the 15 to 24 age group. Adults between 25 and 44 make up 23.5% of the population, while another 25.1% fall into the 45 to 64 bracket. Finally, around 19.2% are 65 or older.

Median age
40.2
Age breakdown
Under 15
17.3%
15 to 24
14.8%
25 to 44
23.5%
45 to 64
25.1%
Over 65
19.2%
Value Percent YoY change
Under 15 9,491 17.3% -0.9%
15 to 24 8,122 14.8% -1.3%
25 to 44 12,861 23.5% 0.9%
45 to 64 13,758 25.1% -2.3%
Over 65 10,538 19.2% 3.0%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Seneca County, 98.7% of the population are US-born citizens, while 0.6% have gained naturalized citizenship. At the same time, 0.7% of residents are non-citizens. As for race, 89.6% of locals are Caucasian, 2.5% are African American and 0.6% have Asian roots. There’s also a share of 5.1% that includes residents with two or more races.

Citizenship
U.S.-born citizens
98.7%
Non-U.S.-born citizens
0.6%
Non-citizens
0.7%
Value Percent YoY change
U.S.-born citizens 54,051 98.7% 0.1%
Non-U.S.-born citizens 316 0.6% -32.3%
Non-citizens 403 0.7% -0.2%
Racial breakdown
White
89.6%
Black or African American
2.5%
American Indian and Alaska Native
0.2%
Asian
0.6%
Native Hawaiian and other Pacific Islander
0%
Two or more races
5.1%
Other
2.1%
Value Percent
White 49,062 89.6%
Black or African American 1,358 2.5%
American Indian and Alaska Native 107 0.2%
Asian 301 0.6%
Native Hawaiian and other Pacific Islander 12 0%
Two or more races 2,771 5.1%
Other 1,159 2.1%

Households in Seneca County

A peek inside Seneca County households

Seneca County has 22,279 households, with an average of 2 members in each. Of these, 63.3% are families, while the remaining 36.7% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
22,279
0.8% year-over-year change
Average people per household
2
Non-family households
8,173
Family households
14,106
Value Percent YoY change
Non-family households 8,173 36.7% 1.5%
Family households 14,106 63.3% 0.4%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Seneca County

The housing landscape of Seneca County

Seneca County's housing consists of 23,982 units, with 78.8% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 2.8% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 4.2% of the housing landscape.

Housing units
23,982
0.1% year-over-year change
Housing types
Value Percent
1 unit, detached 18,885 78.8%
1 unit, attached 671 2.8%
2 units 819 3.4%
3 or 4 units 927 3.9%
5 to 9 units 697 2.9%
10 to 19 units 305 1.3%
20 to 49 units 438 1.8%
50 or more units 236 1%
Mobile home 1,004 4.2%
Homes built since 2020
99
52.3% year-over-year change

The age of buildings in Seneca County

In Seneca County, the median construction year is 1959. About 35.2% of homes were built before the 1940s, with another 4.9% going up by 1949. Most development happened in the second half of the 20th century. Then, 5.9% of homes were added from 2000 to 2009, 2.6% between 2010 and 2019, and 0.4% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 8,451 35.2% -3.9%
Built between 1940 and 1949 1,172 4.9% 7.4%
Built between 1950 and 1959 2,690 11.2% -1.7%
Built between 1960 and 1969 2,258 9.4% -3.5%
Built between 1970 and 1979 3,540 14.8% 6.5%
Built between 1980 and 1989 1,710 7.1% -0.5%
Built between 1990 and 1999 2,010 8.4% 0.8%
Built between 2000 and 2009 1,423 5.9% 9.0%
Built between 2010 and 2019 629 2.6% 4.5%
Built in 2020 or later 99 0.4% 52.3%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Seneca County occupancy rates

Out of the 22,279 occupied housing units in Seneca County, 73.4% are owner-occupied, while 26.6% are lived in by tenants. Meanwhile, 7.1% of all homes on the local market sit vacant.

Occupied housing units
22,279
0.8% year-over-year change
Occupancy breakdown
Renter occupied
5,933
Owner occupied
16,346
Value Percent YoY
change
Renter occupied 5,933 26.6% 1.0%
Owner occupied 16,346 73.4% 0.8%
Unoccupied housing units
7.1%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Seneca County housing costs

Housing costs in Seneca County come to a median of $833 per month, while tenants specifically pay a median gross rent of $856.

Median housing costs per month
$833/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Seneca County
$856/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Seneca County

Seneca County education at a glance

About 47.3% of the population in Seneca County went to high school, while 21.1% pursued college studies. Another 10.7% earned an associate degree and 12.8% hold a bachelor’s. Meanwhile, 6.7% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 605 1.4% 16.4%
High school diploma 20,376 47.3% -1.8%
College diploma 9,096 21.1% 0.4%
Associate degree 4,587 10.7% 3.3%
Bachelor's degree 5,508 12.8% 2.3%
Graduate degree 2,870 6.7% 0.9%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Seneca County

How much people earn in Seneca County

The average annual household income in Seneca County was $82,475 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +3.6% change from the previous year. At the same time, the median income stood at $66,025, reflecting a +1.6% shift over the same period.

Average household income in Seneca County
$82,475/year
3.6% year-over-year change
Median household income in Seneca County
$66,025/year
1.6% year-over-year change

Seneca County income by age

In Seneca County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $79,680. Those with someone between 45 and 64 in charge, often well established professionally, earn $76,676 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $42,844, while those led by someone over 65, many of whom may be retired, have about $48,630 in earnings. Overall, 88.2% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $42,844 3.2%
25 - 44 $79,680 2.6%
45 - 64 $76,676 3.8%
Over 65 $48,630 -3.6%
Above poverty level
45,456
Below poverty level
6,072
Value Percent YoY
change
Above poverty level 45,456 88.2% 0.2%
Below poverty level 6,072 11.8% 0.3%

Employment in Seneca County

Workforce and job types in Seneca County

The job market in Seneca County is powered by 26,549 working residents, spread across a range of industries and roles. 64.5% of the working population are employed in professional or administrative positions, while 35.5% are in hands-on or service-based jobs. Also, 8.5% run their own businesses, 70% are employed by private companies, and 10.8% work in the public sector.

Workforce demographics

Working population
26,549
-0.8% year-over-year change
White collar
17,135
Blue collar
9,414
Value Percent YoY change
White collar 17,135 64.5% 2.9%
Blue collar 9,414 35.5% -6.8%
Employer type
Self employees
8.5%
Private companies
70%
Governmental workers
10.8%
Not for profit companies
10.7%
Value Percent YoY change
Self employees 2,248 8.5% -4.6%
Private companies 18,598 70% -1.6%
Governmental workers 2,865 10.8% 3.5%
Not for profit companies 2,838 10.7% 4.1%
Unemployment rate
3.6%
-10.3% year-over-year change

Available workforce

The unemployment rate in Seneca County stands at 3.6%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Seneca County

How people get around in Seneca County

Commuting methods vary: 89.1% of residents travel by personal vehicle and 4% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 23,284 89.1% -0.3%
Taxicab 62 0.2% -3.1%
Bus or trolleybus 44 0.2% -8.3%
Subway or elevated 5 0% N/A
Motorcycle 29 0.1% -66.3%
Bicycle 23 0.1% -39.5%
Walk 1,058 4% -4.7%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Seneca County by zipcode?

Zipcode Population Number of households Median income Average income
43316 5,968 2,492 $78,828 $89,996
44815 710 297 $74,688 $97,055
44818 1,989 815 $63,922 $83,701
44828 138 56 $0 $20,711
44830 18,671 7,476 $62,990 $72,046
44836 2,496 928 $79,299 $91,532
44802 746 300 $80,000 $87,989
44807 2,244 947 $87,356 $100,206
44809 103 45 $0 $119,653
44811 12,690 5,118 $70,060 $95,396

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FAQs about Seneca County demographics 

What is the total population of Seneca County?

Seneca County has a total population of 54,770 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -0.2% compared to a year ago.

What is the gender ratio in Seneca County?

The gender ratio in Seneca County is as follows:
  • 50.2% males (27,484 residents)
  • 49.8% females (27,286 residents)

What is the median age in Seneca County?

The median age in Seneca County is 40.2.

What is the age distribution of the population in Seneca County?

The age distribution in Seneca County is as follows:
  • Under 15: 17.3% (9,491 residents)
  • Ages 15-24: 14.8% (8,122 residents)
  • Ages 25-44: 23.5% (12,861 residents)
  • Ages 45-64: 25.1% (13,758 residents)
  • Over 65: 19.2% (10,538 residents)

What is the racial and ethnic makeup of Seneca County?

The racial and ethnic makeup of Seneca County is as follows:
  • White: 89.6% (49,062 residents)
  • Black or African American: 2.5% (1,358 residents)
  • American Indian and Alaska Native: 0.2% (107 residents)
  • Asian: 0.6% (301 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (12 residents)
  • Two or More Races: 5.1% (2,771 residents)
  • Other: 2.1% (1,159 residents)

What percentage of the population in Seneca County are U.S.-born citizens?

U.S.-born citizens represent 98.7% of the population in Seneca County.

How many housing units are there in Seneca County?

There are 23,982 housing units in Seneca County, reflecting a +0.1% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Seneca County and what is the average household size?

Seneca County has a total of 22,279 households, with an average of 2 people in each.

What is the median household income in Seneca County?

Seneca County has a median household income of $66,025, representing a +1.6% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Seneca County?

The employment rate is 96.4% in Seneca County, with a workforce of 26,549 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 64.5% (17,135 residents)
  • Blue-collar workers: 35.5% (9,414 residents)

Places of employment:
  • Self-employed: 8.5% (2,248 residents)
  • Private companies: 70% (18,598 residents)
  • Governmental workers: 10.8% (2,865 residents)
  • Not-for-profit companies: 10.7% (2,838 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025