Seneca, IL population age distributions
A complete breakdown of Seneca's age demographics from 0 to 85 years, distributed across 18 age groups is listed in the table below.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 5 years | 206 | 8.03% |
| 5 to 9 years | 189 | 7.37% |
| 10 to 14 years | 168 | 6.55% |
| 15 to 19 years | 198 | 7.72% |
| 20 to 24 years | 100 | 3.9% |
| 25 to 29 years | 283 | 11.03% |
| 30 to 34 years | 140 | 5.46% |
| 35 to 39 years | 99 | 3.86% |
| 40 to 44 years | 50 | 1.95% |
| 45 to 49 years | 116 | 4.52% |
| 50 to 54 years | 199 | 7.76% |
| 55 to 59 years | 287 | 11.19% |
| 60 to 64 years | 254 | 9.9% |
| 65 to 69 years | 92 | 3.59% |
| 70 to 74 years | 83 | 3.24% |
| 75 to 79 years | 48 | 1.87% |
| 80 to 84 years | 26 | 1.01% |
| 85 years and over | 27 | 1.05% |
TABLE OF CONTENTS
Seneca, IL population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Seneca, IL population by age group.
The largest age group is 55 to 59 years with a population of 287 (11.19% of the total population).
The largest age group in Seneca, IL was for the group of age 55 to 59 years with a population of 287 (11.19%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Seneca, IL was the 80 to 84 years with a population of 26 (1.01%).
Seneca, IL population by age cohort
To better understand the age distribution of Seneca, IL's population, we divided it into the following 3 cohorts:
- Children : Under the age of 18 years
- Adults (working population): Between the age of 18 and 64 years
- Seniors: 65 years and above
FIGURE 2
Seneca, IL population by age cohort
The largest age group was 18 to 64 years with a population of 1,611 (62.81% of the total population).
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Seneca 's population under 18 was 26.43%, compared to the 22.11% nationwide.
- Seneca's working population (between 18 and 64) was 62.81%, compared to 61.36% nationwide.
- Seneca's elderly or the senior population (over 65 age) was 10.76% as compared to 16.53% nationwide.
Seneca, IL population pyramid
Population pyramid for Seneca, IL is charted below using the estimates from U.S. Census Bureau's American Community Survey 5-Year estimates. A wide base suggests population increase, narrow base indicates declining birth rates.
Key stats from our analysis of the Seneca's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Seneca, IL, is 32.6.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Seneca, IL, is 16.0.
- Total dependency ratio for Seneca, IL is 48.6.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Seneca, IL is 6.3.
FIGURE 3
Seneca, IL population pyramid
Seneca population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Seneca, IL population pyramid
Here's the Seneca, IL's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 98 | 108 | 206 |
| 5 to 9 years | 52 | 137 | 189 |
| 10 to 14 years | 124 | 44 | 168 |
| 15 to 19 years | 143 | 55 | 198 |
| 20 to 24 years | 49 | 51 | 100 |
| 25 to 29 years | 144 | 139 | 283 |
| 30 to 34 years | 78 | 62 | 140 |
| 35 to 39 years | 68 | 31 | 99 |
| 40 to 44 years | 23 | 27 | 50 |
| 45 to 49 years | 40 | 76 | 116 |
| 50 to 54 years | 34 | 165 | 199 |
| 55 to 59 years | 199 | 88 | 287 |
| 60 to 64 years | 176 | 78 | 254 |
| 65 to 69 years | 32 | 60 | 92 |
| 70 to 74 years | 44 | 39 | 83 |
| 75 to 79 years | 10 | 38 | 48 |
| 80 to 84 years | 11 | 15 | 26 |
| 85 years and over | 6 | 21 | 27 |
Things to know
What is the population of Seneca, IL under 18?
Seneca's population under the age of 18 is 678, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 26.43% of the total resident population of Seneca, IL.
What is the aging population in Seneca, IL?
Seneca's population aged 65 years and above was 276. As per the U.S. Census Bureau's American Community Survey, this population is 10.76% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates