Seneca, IL Population

Overview

2,648

Total Population

32.8

Median age

51.66%

Female population %

93.6:100

Gender ratio (M:F)

25-29 years

Largest age group

52.2

Total dependency ratio

White

Largest racial group

211

Hispanic population

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

TABLE OF CONTENTS

Age

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

The median age in Seneca is 32.8, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Seneca's population under 18 was 27.72%, compared to the 22.51% nationwide.
Seneca's elderly or the senior population (over 65 age) was 10.95% as compared to 16.04% nationwide.
Of the total population in Seneca, 23.34% were under the age of 15, 23.34% aged 15 to 29, 42.37% aged 30 to 64, 9.63% aged 65 to 84, and 1.32% were 85 years of age and older.

There are 88 more females than males in Seneca:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 51.66% females and 48.34% males in Seneca, IL.
The Seneca, IL gender ratio is 93.6:100 i.e. 93.6 men to 100 women (0.936).
For male population, the largest age group is 60-64 years with a population of 160.
For the female population, the largest age group is 50-54 years with a population of 185.

Seneca's population has become increasingly diverse:

Racial distribution of Seneca population: 91.54% are White, 1.40% are Black or African American, 1.81% are some other race and 5.25% are multiracial.
Seneca's racial breakdown clearly shows that there is an absolute majority of White population in the village.
By ethnicity, 211 is Hispanic or Latino (of any race), and 2,437 (92.03% of the total population) is Non-Hispanic.
The largest racial group in Seneca is White with a population of 2,424 (91.54% of the total population).

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

The peak population was 2,352 in the year 2010
From 2000 to 2010, Seneca's population increased by 190 (8.79%), as compared to the national growth of 9.63%.
From 2010 to 2020, Seneca's population decreased by 10 (0.43%), 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's population was lowest in year 2002 at 2,152.