Mercer County, NJ population age distributions
A complete breakdown of Mercer 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 | 21,160 | 5.51% |
| 5 to 9 years | 22,082 | 5.75% |
| 10 to 14 years | 24,296 | 6.33% |
| 15 to 19 years | 28,122 | 7.33% |
| 20 to 24 years | 28,113 | 7.33% |
| 25 to 29 years | 23,966 | 6.25% |
| 30 to 34 years | 23,447 | 6.11% |
| 35 to 39 years | 24,169 | 6.3% |
| 40 to 44 years | 25,152 | 6.55% |
| 45 to 49 years | 25,915 | 6.75% |
| 50 to 54 years | 26,549 | 6.92% |
| 55 to 59 years | 25,650 | 6.68% |
| 60 to 64 years | 25,036 | 6.52% |
| 65 to 69 years | 20,348 | 5.3% |
| 70 to 74 years | 14,349 | 3.74% |
| 75 to 79 years | 9,786 | 2.55% |
| 80 to 84 years | 7,759 | 2.02% |
| 85 years and over | 7,833 | 2.04% |
TABLE OF CONTENTS
Mercer County, NJ population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Mercer County, NJ population by age group.
The largest age group is 15 to 19 years with a population of 28,122 (7.33% of the total population).
The largest age group in Mercer County, NJ was for the group of age 15 to 19 years with a population of 28,122 (7.33%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Mercer County, NJ was the 80 to 84 years with a population of 7,759 (2.02%).
Mercer County, NJ population by age cohort
To better understand the age distribution of Mercer County, NJ'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
Mercer County, NJ population by age cohort
The largest age group was 18 to 64 years with a population of 241,486 (62.93% of the total population).
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Mercer County 's population under 18 was 21.41%, compared to the 22.11% nationwide.
- Mercer County's working population (between 18 and 64) was 62.93%, compared to 61.36% nationwide.
- Mercer County's elderly or the senior population (over 65 age) was 15.66% as compared to 16.53% nationwide.
Mercer County, NJ population pyramid
Population pyramid for Mercer County, NJ 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 Mercer County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Mercer County, NJ, is 26.4.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Mercer County, NJ, is 23.5.
- Total dependency ratio for Mercer County, NJ is 49.8.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Mercer County, NJ is 4.3.
FIGURE 3
Mercer County, NJ population pyramid
Mercer County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Mercer County, NJ population pyramid
Here's the Mercer County, NJ's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 10,888 | 10,272 | 21,160 |
| 5 to 9 years | 11,962 | 10,120 | 22,082 |
| 10 to 14 years | 11,887 | 12,409 | 24,296 |
| 15 to 19 years | 13,914 | 14,208 | 28,122 |
| 20 to 24 years | 14,264 | 13,849 | 28,113 |
| 25 to 29 years | 12,503 | 11,463 | 23,966 |
| 30 to 34 years | 12,007 | 11,440 | 23,447 |
| 35 to 39 years | 12,524 | 11,645 | 24,169 |
| 40 to 44 years | 12,414 | 12,738 | 25,152 |
| 45 to 49 years | 13,038 | 12,877 | 25,915 |
| 50 to 54 years | 13,194 | 13,355 | 26,549 |
| 55 to 59 years | 12,588 | 13,062 | 25,650 |
| 60 to 64 years | 12,269 | 12,767 | 25,036 |
| 65 to 69 years | 9,859 | 10,489 | 20,348 |
| 70 to 74 years | 6,229 | 8,120 | 14,349 |
| 75 to 79 years | 4,420 | 5,366 | 9,786 |
| 80 to 84 years | 2,938 | 4,821 | 7,759 |
| 85 years and over | 2,597 | 5,236 | 7,833 |
Things to know
What is the population of Mercer County, NJ under 18?
Mercer County's population under the age of 18 is 82,171, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.41% of the total resident population of Mercer County, NJ.
What is the aging population in Mercer County, NJ?
Mercer County's population aged 65 years and above was 60,075. As per the U.S. Census Bureau's American Community Survey, this population is 15.66% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates