Hennepin County, MN population age distribution
A complete breakdown of Hennepin 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 | 79,397 | 6.25% |
5 to 9 years | 78,865 | 6.21% |
10 to 14 years | 76,775 | 6.04% |
15 to 19 years | 74,269 | 5.85% |
20 to 24 years | 77,346 | 6.09% |
25 to 29 years | 105,218 | 8.28% |
30 to 34 years | 105,522 | 8.31% |
35 to 39 years | 96,669 | 7.61% |
40 to 44 years | 82,015 | 6.46% |
45 to 49 years | 75,606 | 5.95% |
50 to 54 years | 77,822 | 6.13% |
55 to 59 years | 83,769 | 6.59% |
60 to 64 years | 77,127 | 6.07% |
65 to 69 years | 62,584 | 4.93% |
70 to 74 years | 46,610 | 3.67% |
75 to 79 years | 28,843 | 2.27% |
80 to 84 years | 18,741 | 1.48% |
85 years and over | 23,105 | 1.82% |
TABLE OF CONTENTS
Hennepin County, MN population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

The largest age group in Hennepin County, MN was for the group of age 30-34 years with a population of 105,522 (8.31%), according to the 2021 American Community Survey.
At the same time, the smallest age group in Hennepin County, MN was the 80-84 years with a population of 18,741 (1.48%).
Hennepin County, MN population by age cohort
To better understand the age distribution of Hennepin County, MN'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 | 280,161 | 22.06% |
18 to 64 years | 810,239 | 63.78% |
85 years and over | 179,883 | 14.16% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Hennepin County's population under 18 was 22.06%, compared to the 22.51% nationwide.
- Hennepin County's working population (between 18 and 64) was 63.78%, compared to 61.45% nationwide.
- Hennepin County's elderly or the senior population (over 65 age) was 14.16% as compared to 16.04% nationwide.
Hennepin County, MN population pyramid
Population pyramid for Hennepin County, MN 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 Hennepin County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Hennepin County, MN, is 27.5.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Hennepin County, MN, is 21.0.
- Total dependency ratio for Hennepin County, MN is 48.5.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Hennepin County, MN is 4.8.

Here's the Hennepin County, MN's male and female population across different age groups:
Age Group | Population(Male) | Population(Female) | Total Population |
---|---|---|---|
Under 5 years | 40,495 | 38,902 | 79,397 |
5 to 9 years | 40,646 | 38,219 | 78,865 |
10 to 14 years | 38,556 | 38,219 | 76,775 |
15 to 19 years | 37,750 | 36,519 | 74,269 |
20 to 24 years | 38,243 | 39,103 | 77,346 |
25 to 29 years | 53,515 | 51,703 | 105,218 |
30 to 34 years | 54,074 | 51,448 | 105,522 |
35 to 39 years | 49,310 | 47,359 | 96,669 |
40 to 44 years | 41,589 | 40,426 | 82,015 |
45 to 49 years | 38,409 | 37,197 | 75,606 |
50 to 54 years | 39,244 | 38,578 | 77,822 |
55 to 59 years | 41,220 | 42,549 | 83,769 |
60 to 64 years | 38,408 | 38,719 | 77,127 |
65 to 69 years | 29,153 | 33,431 | 62,584 |
70 to 74 years | 22,282 | 24,328 | 46,610 |
75 to 79 years | 12,406 | 16,437 | 28,843 |
80 to 84 years | 8,141 | 10,600 | 18,741 |
85 years and over | 8,067 | 15,038 | 23,105 |
Things to know
What is the population of Hennepin County, MN under 18?
Hennepin County's population under the age of 18 is 280,161, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 22.06% of the total resident population of Hennepin County, MN.
What is the aging population in Hennepin County, MN?
Hennepin County's population aged 65 years and above was 179,883. As per the U.S. Census Bureau's American Community Survey, this population is 14.16% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates