Seneca County, Ohio Population 2024

54,520

Seneca County, Ohio's estimated 2024 population is 54,520 with a growth rate of -0.01% in the past year according to the most recent United States census data. Seneca County, Ohio is the 47th largest county in Ohio. The 2010 population was 56,619 and has seen a growth of -3.71% since that time.

Note: data after 2022 is projected based on recent change
Year
Population
Growth
Change
202954,485-7-0.01%
202854,492-7-0.01%
202754,499-7-0.01%
202654,506-7-0.01%
202554,513-7-0.01%
202454,520-7-0.01%
202354,527-7-0.01%
202254,534-330-0.6%
202154,864-190-0.35%
202055,054-166-0.3%
201955,220-36-0.07%
201855,256-66-0.12%
201755,322-195-0.35%
201655,517-155-0.28%
201555,672-147-0.26%
201455,819-41-0.07%
201355,860-257-0.46%
201256,117-409-0.72%
201156,526-93-0.16%
201056,61900%
199059,733-2,168-3.5%
198061,9011,2051.99%
197060,6961,3702.31%
196059,3266,34811.98%
195052,9784,4799.24%
194048,4995581.16%
193047,9414,76511.04%
192043,1767551.78%
191042,4211,2583.06%
190041,1632940.72%
189040,8693,92210.62%
188036,9476,12019.85%
187030,827-41-0.13%
186030,8683,76413.89%
185027,1048,97649.51%
184018,12812,969251.39%
18305,159-49,326-90.53%
2024 Growth Rate
-0.01% (-7)
County Website
Seneca County
State
Ohio
County Seat
Tiffin
2020 Population
55,054
Area
551 mi²
Density
99 people/mi²
Growth Since 2020
-0.97% (-534)
Founded
April 1, 1824

Population by Race

Race
Population
Percentage (of total)
White49,64190.49%
Two or more races2,2804.16%
Black or African American1,4792.7%
Other race9641.76%
Asian3030.55%
Native American1820.33%
Native Hawaiian or Pacific Islander120.02%

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Seneca County, Ohio Population by Race

Seneca County, Ohio Population Pyramid 2024

Seneca County, Ohio Median Age

40.5

Total

39.6

Male

41.6

Female

Seneca County, Ohio Adults

There are 42,998 adults, (10,235 of whom are seniors) in Seneca County, Ohio.

Seneca County, Ohio Age Dependency

67.4

Age Dependency Ratio

31.2

Old Age Dependency Ratio

36.2

Child Dependency Ratio

Seneca County, Ohio Sex Ratio

Female27,20649.59%
Male27,65550.41%

Seneca County, Ohio Population by Age

Seneca County, Ohio Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All22,0992.3673.426.6
Married10,3192.9987.812.2
Non Family8,0551.2162.837.2
Female2,5233.1849.450.6
Male1,2022.897228

2.9

Average Family Size

2.36

Average Household Size

73.4%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Seneca County, Ohio Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade2,0435.51%
Associates Degree4,10211.07%
Bachelors Degree4,89713.21%
Graduate Degree2,7797.5%
High School Graduate15,96543.08%
Less Than 9th Grade4621.25%
Some College6,81218.38%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Seneca County, Ohio Educational Attainment by Sex (over 25)

Seneca County, Ohio Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

Race
Total
High School
Bachelors
White33,90131,8237,094
Hispanic1,5481,407216
2+ Races1,003943209
Black70949070
Other Race54348452
Asian228222186
Native American11310412

The highest rate of high school graduation is among asian people with a rate of 97.37%.

The highest rate of bachelors degrees is among asian people with a rate of 81.58%.

Seneca County, Ohio Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$55,388$58,455$53,611
Graduate Degree$62,141$68,563$58,885
High School Graduate$40,198$46,857$30,366
Less Than 9th Grade$35,560$40,700$24,952
Overall$43,549$50,921$35,436
Some College$41,932$55,399$33,509

$43,549

Average Earnings

$50,921

Average Male

$35,436

Average Female

Seneca County, Ohio Earnings by Educational Attainment

Seneca County, Ohio Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Seneca County, Ohio Language

96.9% of Seneca County, Ohio residents speak only English, while 3.1% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.86% of the population.

Seneca County, Ohio Language

Seneca County, Ohio Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White46,2875,04310.9%
Black1,00349849.65%
Multiple2,16838917.94%
Hispanic2,92831610.79%
Other923889.53%
Asian2858429.47%
Native180116.11%

11.91%

Overall Poverty Rate

10.34%

Male Poverty Rate

13.49%

Female Poverty Rate

Poverty in Seneca County, Ohio

The race most likely to be in poverty in Seneca County, Ohio is Black, with 49.65% below the poverty level.

The race least likely to be in poverty in Seneca County, Ohio is Native, with 6.11% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.96%. Among those working part-time, it was 16.59%, and for those that did not work, the poverty rate was 18.89%.

Seneca County, Ohio Poverty

rate

Rate
Poverty
Less Than 9th Grade20.78%
High School10.77%
Some College8.93%
Bachelors or Greater3.21%

Seneca County, Ohio Poverty Rate by Education

rate

Rate
Poverty
Male Unemployed45.41%
Female Unemployed43.5%
Female Employed7.35%
Male Employed3.26%

Seneca County, Ohio Poverty Rate by Employment Status and Sex

Seneca County, Ohio Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$78,879$93,840
Households$65,020$79,613
Married Families$94,198$108,189
Non Families$36,477$49,341

mean

median

Income by Household Type

Seneca County, Ohio Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

47.4%

Overall Marriage Rate

47.4%

Male Marriage Rate

47.4%

Female Marriage Rate

Seneca County, Ohio Married by Age and Sex

male

female

Seneca County, Ohio Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

Seneca County, Ohio Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Seneca County, Ohio Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

2,962

Number of Veterans

2,799

Male Veterans

163

Female Veterans

War
Veterans
Vietnam1,078
First Gulf War559
Second Gulf War486
Korea121
World War II0

Seneca County, Ohio Veterans by War

count

Age Group
Veterans
65 to 74825
75+772
35 to 54696
55 to 64549
18 to 34120

Seneca County, Ohio Veterans by Age

count

Name
Veterans
% of Total
White2,7416.95%
2+ Races1098.69%
Hispanic924.67%
Other Race739.63%
Native American3933.91%

Seneca County, Ohio Veterans by Race

Seneca County, Ohio Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

6.81%

Veteran Poverty Rate

29.79%

Veteran Disability Rate

Seneca County, Ohio Veterans by Education

LaborForceParticipation

62.3%

Labor Force Participation

59.9%

Employment Rate

3.9%

Unemployment Rate

Seneca County, Ohio Employment by Age

LaborForceParticipation

Seneca County, Ohio Employment by Race

LaborForceParticipation

Seneca County, Ohio Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

88%

Born in Seneca County, Ohio

98.51%

Native Born

1.49%

Foreign Born

0.74%

Non Citizen

0.75%

Naturalized

Place of Birth

98.51% of Seneca County, Ohio residents were born in the United States, with 88% having been born in Ohio. 0.74% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Seneca County, Ohio Place of Birth

Sources