Seneca County, Ohio Population 2021

Seneca County, Ohio's estimated population is 55,146 with a growth rate of -0.03% in the past year according to the most recent United States census data. Seneca County, Ohio is the 48th largest county in Ohio. The 2010 Population was 56,618 and has seen a growth of -2.60% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
202155,146-16-0.03%
202055,162-16-0.03%
201955,178-16-0.03%
201855,194-73-0.13%
201755,267-200-0.36%
201655,467-183-0.33%
201555,650-153-0.27%
201455,803-44-0.08%
201355,847-259-0.46%
201256,106-416-0.74%
201156,522-96-0.17%
201056,618-3,115-5.21%
199059,733-2,168-3.50%
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%
18305,1590.00%
2021 Growth Rate
-0.03%
County Website
State
Founded
April 1, 1824
County Seat
2010 Population
56,618
Growth Since 2010
-2.60%
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Seneca County, Ohio Population Growth

Population by Race

Race Population Percentage
White51,88693.74%
Black or African American1,7163.10%
Two or More Races9611.74%
Asian3440.62%
Some Other Race3390.61%
American Indian and Alaska Native1050.19%
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Seneca County, Ohio Population by Race

Seneca County, Ohio Population Pyramid $2021

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Seneca County, Ohio Median Age

39.9


Total

38.3


Male

41.3


Female

Seneca County, Ohio Adults

There are 43,163 adults, (9,675 of whom are seniors) in Seneca County, Ohio.

Seneca County, Ohio Age Dependency

65.3

Age Dependency Ratio

28.9

Old Age Dependency Ratio

36.4

Child Dependency Ratio

Seneca County, Ohio Sex Ratio

Female

27,728

50.09%

Male

27,623

49.91%

Seneca County, Ohio Population by Age

Seneca County, Ohio Renter vs Owner Occupied by Household Type

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Seneca County, Ohio Household Types

Type Owner Renter
Married87.8%12.2%
All72.3%27.7%
Non Family61.8%38.2%
Male55.3%44.7%
Female47.4%52.6%

72.3%

Rate of Home Ownership

Seneca County, Ohio Households and Families

Type Count Average Size Owned
All21,6482.4172.3
Married10,3502.9887.8
Non Family7,5091.2461.8
Female2,3363.1647.4
Male1,4533.2455.3

2.91

Average Family Size

2.41

Average Household Size

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Seneca County, Ohio Households by Type

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Education Attained Count Percentage
Less Than 9th Grade7812.10%
9th to 12th Grade2,3026.18%
High School Graduate16,83645.23%
Some College7,38919.85%
Associates Degree3,6519.81%
Bachelors Degree3,88710.44%
Graduate Degree2,3746.38%
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Seneca County, Ohio Educational Attainment by Sex (over 25)

Seneca County, Ohio Educational Attainment by Race

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Race Total High School Bachelors
White34,53331,9815,881
Hispanic1,4191,159153
Black80162464
2+ Races25325373
Asian24716196
Other Race211129
Native American564810

The highest rate of high school graduation is among 2+ races people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 38.87%.

Seneca County, Ohio Educational Attainment by Race

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Name Average Male Female
Overall$35,038$41,921$27,756
Less Than 9th Grade$18,804$25,750$15,583
High School Graduate$32,439$37,706$24,269
Some College$33,997$47,394$26,257
Bachelors Degree$42,288$54,127$37,671
Graduate Degree$55,148$62,888$53,508

$35,038

Average Earnings

$41,921

Average Male

$27,756

Average Female

Seneca County, Ohio Earnings by Educational Attainment

Seneca County, Ohio Language by Age

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Seneca County, Ohio Language

96.14% of Seneca County, Ohio residents speak only English, while 3.86% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.22% of the population.

Seneca County, Ohio Language

Seneca County, Ohio Poverty by Race

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Name Total In Poverty Poverty Rate
White47,1895,15910.93%
Black1,23963951.57%
Hispanic2,57850119.43%
Multiple86828232.49%
Asian31215549.68%
Native1053634.29%
Other2543513.78%

12.81%

Overall Poverty Rate

10.61%

Male Poverty Rate

15.02%

Female Poverty Rate

Poverty in Seneca County, Ohio

The race most likely to be in poverty in Seneca County, Ohio is Black, with 51.57% below the poverty level.

The race least likely to be in poverty in Seneca County, Ohio is White, with 10.93% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.47%. Among those working part-time, it was 15.56%, and for those that did not work, the poverty rate was 20.51%.

Seneca County, Ohio Poverty

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Name Poverty
Less Than 9th Grade26.81%
Some College9.60%
High School8.77%
Bachelors or Greater6.82%

Seneca County, Ohio Poverty Rate by Education

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Rate Poverty
Female Unemployed46.37%
Male Unemployed37.37%
Female Employed7.95%
Male Employed4.22%

Seneca County, Ohio Poverty Rate by Employment Status and Sex

Seneca County, Ohio Income by Household Type

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Name Median Mean
Households$52,500$67,625
Families$63,929$76,975
Married Families$75,982$89,674
Non Families$31,495$45,099
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Income by Household Type

Seneca County, Ohio Marital Status

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Marriage Rates

47.3%

Overall Marriage Rate

47.4%

Male Marriage Rate

47.3%

Female Marriage Rate

Seneca County, Ohio Married by Age and Sex

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Seneca County, Ohio Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 55-64.

Seneca County, Ohio Marital Status by Race

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Seneca County, Ohio Marital Status

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3,599

Number of Veterans

3,360

Male Veterans

239

Female Veterans

War Veterans
Vietnam1,227
First Gulf War706
Second Gulf War630
Korea368
World War II78

Seneca County, Ohio Veterans by War

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Age Group Veterans
65 to 74989
35 to 54969
75+775
55 to 64555
18 to 34311

Seneca County, Ohio Veterans by Age

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Name Veterans % of Total
White3,5048.60%
Hispanic1085.92%
Native American3942.39%
2+ Races244.92%
Other Race228.24%
Black100.79%

Seneca County, Ohio Veterans by Race

Seneca County, Ohio Veterans by Education

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8.42%

Veteran Poverty Rate

29.60%

Veteran Disability Rate

Seneca County, Ohio Veterans by Education

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62.7%

Labor Force Participation

60%

Employment Rate

4.4%

Unemployment Rate

Seneca County, Ohio Employment by Age

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Seneca County, Ohio Employment by Race

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Seneca County, Ohio Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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86.56%

Born in Seneca County, Ohio

98.08%

Native Born

1.92%

Foreign Born

1.10%

Non Citizen

0.82%

Naturalized

Place of Birth

98.08% of Seneca County, Ohio residents were born in the United States, with 86.56% having been born in Ohio. 1.10% 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

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources