New Castle County, DE population age distributions
A complete breakdown of New Castle County'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 | 31,591 | 5.51% |
| 5 to 9 years | 32,308 | 5.64% |
| 10 to 14 years | 36,731 | 6.41% |
| 15 to 19 years | 38,731 | 6.76% |
| 20 to 24 years | 35,126 | 6.13% |
| 25 to 29 years | 37,982 | 6.63% |
| 30 to 34 years | 42,080 | 7.34% |
| 35 to 39 years | 37,442 | 6.53% |
| 40 to 44 years | 37,201 | 6.49% |
| 45 to 49 years | 33,669 | 5.88% |
| 50 to 54 years | 37,466 | 6.54% |
| 55 to 59 years | 38,011 | 6.63% |
| 60 to 64 years | 39,531 | 6.9% |
| 65 to 69 years | 32,238 | 5.63% |
| 70 to 74 years | 24,714 | 4.31% |
| 75 to 79 years | 16,387 | 2.86% |
| 80 to 84 years | 11,260 | 1.96% |
| 85 years and over | 10,562 | 1.84% |
TABLE OF CONTENTS
New Castle County, DE population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2019-2023
FIGURE 1
New Castle County, DE population by age group.
The largest age group is 30 to 34 years with a population of 42,080 (7.34% of the total population).
The largest age group in New Castle County, DE was for the group of age 30 to 34 years with a population of 42,080 (7.34%), according to the 2019-2023 American Community Survey.
At the same time, the smallest age group in New Castle County, DE was the 85 years and over with a population of 10,562 (1.84%).
New Castle County, DE population by age cohort
To better understand the age distribution of New Castle County, DE'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
New Castle County, DE population by age cohort
The largest age group was 18 to 64 years with a population of 355,316 (62.01% of the total population).
New Castle County, DE population by age cohort
Here's the population for each of the three cohorts.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 18 years | 122,553 | 21.39% |
| 18 to 64 years | 355,316 | 62.01% |
| 65 years and over | 95,161 | 16.61% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- New Castle County 's population under 18 was 21.39%, compared to the 22.16% nationwide.
- New Castle County's working population (between 18 and 64) was 62.01%, compared to 61% nationwide.
- New Castle County's elderly or the senior population (over 65 age) was 16.61% as compared to 16.84% nationwide.
New Castle County, DE population pyramid
Population pyramid for New Castle County, DE 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 New Castle County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for New Castle County, DE, is 26.7.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for New Castle County, DE, is 25.2.
- Total dependency ratio for New Castle County, DE is 51.9.
- Potential support ratio, which is the number of youth (working age population) per elderly, for New Castle County, DE is 4.0.
FIGURE 3
New Castle County, DE population pyramid
New Castle County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
New Castle County, DE population pyramid
Here's the New Castle County, DE's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 16,024 | 15,567 | 31,591 |
| 5 to 9 years | 16,628 | 15,680 | 32,308 |
| 10 to 14 years | 18,345 | 18,386 | 36,731 |
| 15 to 19 years | 19,251 | 19,480 | 38,731 |
| 20 to 24 years | 17,660 | 17,466 | 35,126 |
| 25 to 29 years | 18,888 | 19,094 | 37,982 |
| 30 to 34 years | 20,802 | 21,278 | 42,080 |
| 35 to 39 years | 19,216 | 18,226 | 37,442 |
| 40 to 44 years | 17,713 | 19,488 | 37,201 |
| 45 to 49 years | 16,405 | 17,264 | 33,669 |
| 50 to 54 years | 17,958 | 19,508 | 37,466 |
| 55 to 59 years | 19,026 | 18,985 | 38,011 |
| 60 to 64 years | 18,216 | 21,315 | 39,531 |
| 65 to 69 years | 14,916 | 17,322 | 32,238 |
| 70 to 74 years | 11,337 | 13,377 | 24,714 |
| 75 to 79 years | 7,035 | 9,352 | 16,387 |
| 80 to 84 years | 4,917 | 6,343 | 11,260 |
| 85 years and over | 3,782 | 6,780 | 10,562 |
Things to know
What is the population of New Castle County, DE under 18?
New Castle County's population under the age of 18 is 122,553, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.39% of the total resident population of New Castle County, DE.
What is the aging population in New Castle County, DE?
New Castle County's population aged 65 years and above was 95,161. As per the U.S. Census Bureau's American Community Survey, this population is 16.61% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates
