Seneca County, NY Population

Overview

33,900

Total Population

42.5

Median age

47.27%

Female population %

111.5:100

Gender ratio (M:F)

55-59 years

Largest age group

55.6

Total dependency ratio

White

Largest racial group

1,262

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 42.5, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Seneca County's population under 18 was 20.09%, compared to the 22.51% nationwide.
Seneca County's elderly or the senior population (over 65 age) was 19.17% as compared to 16.04% nationwide.
Of the total population in Seneca County, 16.58% were under the age of 15, 18.07% aged 15 to 29, 46.18% aged 30 to 64, 16.60% aged 65 to 84, and 2.57% were 85 years of age and older.

There are 1,848 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 47.27% females and 52.73% males in Seneca County, NY.
The Seneca County, NY gender ratio is 111.5:100 i.e. 111.5 men to 100 women (1.115).
For male population, the largest age group is 30-34 years with a population of 1,340.
For the female population, the largest age group is 55-59 years with a population of 1,311.

Seneca County's population has become increasingly diverse:

Racial distribution of Seneca County population: 89.71% are White, 5.21% are Black or African American, 0.31% are American Indian and Alaska Native, 0.61% are Asian, 0.04% are Native Hawaiian and other Pacific Islander, 0.96% are some other race and 3.17% are multiracial.
Seneca County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 1,262 is Hispanic or Latino (of any race), and 32,638 (96.28% of the total population) is Non-Hispanic.
The largest racial group in Seneca County is White with a population of 30,411 (89.71% of the total population).

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

The peak population was 35,354 in the year 2012
From 2000 to 2010, Seneca County's population increased by 1,978 (5.94%), as compared to the national growth of 9.63%.
From 2010 to 2020, Seneca County's population decreased by 1,524 (4.32%), 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 32,882.