Seneca County, OH Population

Overview

55,166

Total Population

40.5

Median age

49.66%

Female population %

101.4:100

Gender ratio (M:F)

15-19 years

Largest age group

55.3

Total dependency ratio

White

Largest racial group

3,003

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Seneca County's population is old compared to the rest of the country:

The median age in Seneca County is 40.5, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Seneca County's population under 18 was 22.02%, compared to the 22.51% nationwide.
Seneca County's elderly or the senior population (over 65 age) was 17.84% as compared to 16.04% nationwide.
Of the total population in Seneca County, 17.78% were under the age of 15, 20.49% aged 15 to 29, 43.89% aged 30 to 64, 15.54% aged 65 to 84, and 2.29% were 85 years of age and older.

There are 376 less females than males in Seneca County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.66% females and 50.34% males in Seneca County, OH.
The Seneca County, OH gender ratio is 101.4:100 i.e. 101.4 men to 100 women (1.014).
For male population, the largest age group is 15-19 years with a population of 2,205.
For the female population, the largest age group is 15-19 years with a population of 2,184.

Seneca County's population has become increasingly diverse:

Racial distribution of Seneca County population: 92.04% are White, 3.19% are Black or African American, 0.39% are American Indian and Alaska Native, 0.56% are Asian, 1.25% are some other race and 2.57% are multiracial.
Seneca County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 3,003 is Hispanic or Latino (of any race), and 52,163 (94.56% of the total population) is Non-Hispanic.
The largest racial group in Seneca County is White with a population of 50,775 (92.04% of the total population).

Seneca County's population has already reached its peak and is showing a trend of decline:

The peak population was 58,587 in the year 2000
From 2000 to 2010, Seneca County's population decreased by 1,968 (3.36%), as compared to the national growth of 9.63%.
From 2010 to 2020, Seneca County's population decreased by 1,568 (2.77%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Seneca County's population was lowest in year 2022 at 54,632.