Bronx County, NY population age distribution
A complete breakdown of Bronx 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 | 102,948 | 7.01% |
5 to 9 years | 97,501 | 6.64% |
10 to 14 years | 105,719 | 7.2% |
15 to 19 years | 99,002 | 6.74% |
20 to 24 years | 103,660 | 7.06% |
25 to 29 years | 118,946 | 8.1% |
30 to 34 years | 110,124 | 7.5% |
35 to 39 years | 95,436 | 6.5% |
40 to 44 years | 92,770 | 6.32% |
45 to 49 years | 88,771 | 6.05% |
50 to 54 years | 93,310 | 6.36% |
55 to 59 years | 91,263 | 6.22% |
60 to 64 years | 77,797 | 5.3% |
65 to 69 years | 61,670 | 4.2% |
70 to 74 years | 47,453 | 3.23% |
75 to 79 years | 33,981 | 2.31% |
80 to 84 years | 23,589 | 1.61% |
85 years and over | 24,322 | 1.66% |
TABLE OF CONTENTS
Bronx County, NY population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

The largest age group in Bronx County, NY was for the group of age 25-29 years with a population of 118,946 (8.10%), according to the 2021 American Community Survey.
At the same time, the smallest age group in Bronx County, NY was the 80-84 years with a population of 23,589 (1.61%).
Bronx County, NY population by age cohort
To better understand the age distribution of Bronx County, NY'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

Here's the population for each of the three cohorts.
Age Group | Population | % of Total Population |
---|---|---|
Under 18 years | 365,944 | 24.92% |
18 to 64 years | 911,303 | 62.07% |
85 years and over | 191,015 | 13.01% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Bronx County's population under 18 was 24.92%, compared to the 22.51% nationwide.
- Bronx County's working population (between 18 and 64) was 62.07%, compared to 61.45% nationwide.
- Bronx County's elderly or the senior population (over 65 age) was 13.01% as compared to 16.04% nationwide.
Bronx County, NY population pyramid
Population pyramid for Bronx County, NY 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 Bronx County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Bronx County, NY, is 31.5.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Bronx County, NY, is 19.7.
- Total dependency ratio for Bronx County, NY is 51.2.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Bronx County, NY is 5.1.

Here's the Bronx County, NY's male and female population across different age groups:
Age Group | Population(Male) | Population(Female) | Total Population |
---|---|---|---|
Under 5 years | 52,236 | 50,712 | 102,948 |
5 to 9 years | 49,835 | 47,666 | 97,501 |
10 to 14 years | 53,881 | 51,838 | 105,719 |
15 to 19 years | 50,934 | 48,068 | 99,002 |
20 to 24 years | 51,792 | 51,868 | 103,660 |
25 to 29 years | 57,975 | 60,971 | 118,946 |
30 to 34 years | 53,156 | 56,968 | 110,124 |
35 to 39 years | 45,412 | 50,024 | 95,436 |
40 to 44 years | 42,773 | 49,997 | 92,770 |
45 to 49 years | 41,375 | 47,396 | 88,771 |
50 to 54 years | 43,291 | 50,019 | 93,310 |
55 to 59 years | 42,345 | 48,918 | 91,263 |
60 to 64 years | 34,689 | 43,108 | 77,797 |
65 to 69 years | 26,978 | 34,692 | 61,670 |
70 to 74 years | 20,003 | 27,450 | 47,453 |
75 to 79 years | 13,423 | 20,558 | 33,981 |
80 to 84 years | 8,337 | 15,252 | 23,589 |
85 years and over | 7,366 | 16,956 | 24,322 |
Things to know
What is the population of Bronx County, NY under 18?
Bronx County's population under the age of 18 is 365,944, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 24.92% of the total resident population of Bronx County, NY.
What is the aging population in Bronx County, NY?
Bronx County's population aged 65 years and above was 191,015. As per the U.S. Census Bureau's American Community Survey, this population is 13.01% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates