Middlesex County, MA population age distributions
A complete breakdown of Middlesex 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 | 82,549 | 5.09% |
| 5 to 9 years | 87,210 | 5.37% |
| 10 to 14 years | 91,682 | 5.65% |
| 15 to 19 years | 102,812 | 6.34% |
| 20 to 24 years | 109,625 | 6.75% |
| 25 to 29 years | 122,364 | 7.54% |
| 30 to 34 years | 122,809 | 7.57% |
| 35 to 39 years | 117,314 | 7.23% |
| 40 to 44 years | 106,993 | 6.59% |
| 45 to 49 years | 101,220 | 6.24% |
| 50 to 54 years | 106,889 | 6.59% |
| 55 to 59 years | 110,747 | 6.82% |
| 60 to 64 years | 101,092 | 6.23% |
| 65 to 69 years | 83,248 | 5.13% |
| 70 to 74 years | 67,899 | 4.18% |
| 75 to 79 years | 45,332 | 2.79% |
| 80 to 84 years | 29,518 | 1.82% |
| 85 years and over | 33,593 | 2.07% |
TABLE OF CONTENTS
Middlesex County, MA population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2019-2023
FIGURE 1
Middlesex County, MA population by age group.
The largest age group is 30 to 34 years with a population of 122,809 (7.57% of the total population).
The largest age group in Middlesex County, MA was for the group of age 30 to 34 years with a population of 122,809 (7.57%), according to the 2019-2023 American Community Survey.
At the same time, the smallest age group in Middlesex County, MA was the 80 to 84 years with a population of 29,518 (1.82%).
Middlesex County, MA population by age cohort
To better understand the age distribution of Middlesex County, MA'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
Middlesex County, MA population by age cohort
The largest age group was 18 to 64 years with a population of 1.04 million (64.38% of the total population).
Middlesex County, MA population by age cohort
Here's the population for each of the three cohorts.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 18 years | 318,468 | 19.62% |
| 18 to 64 years | 1,044,838 | 64.38% |
| 65 years and over | 259,590 | 16% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Middlesex County 's population under 18 was 19.62%, compared to the 22.16% nationwide.
- Middlesex County's working population (between 18 and 64) was 64.38%, compared to 61% nationwide.
- Middlesex County's elderly or the senior population (over 65 age) was 16% as compared to 16.84% nationwide.
Middlesex County, MA population pyramid
Population pyramid for Middlesex County, MA 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 Middlesex County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Middlesex County, MA, is 23.7.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Middlesex County, MA, is 23.6.
- Total dependency ratio for Middlesex County, MA is 47.3.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Middlesex County, MA is 4.2.
FIGURE 3
Middlesex County, MA population pyramid
Middlesex County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Middlesex County, MA population pyramid
Here's the Middlesex County, MA's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 42,280 | 40,269 | 82,549 |
| 5 to 9 years | 45,457 | 41,753 | 87,210 |
| 10 to 14 years | 46,140 | 45,542 | 91,682 |
| 15 to 19 years | 52,397 | 50,415 | 102,812 |
| 20 to 24 years | 55,070 | 54,555 | 109,625 |
| 25 to 29 years | 62,653 | 59,711 | 122,364 |
| 30 to 34 years | 62,373 | 60,436 | 122,809 |
| 35 to 39 years | 58,353 | 58,961 | 117,314 |
| 40 to 44 years | 53,898 | 53,095 | 106,993 |
| 45 to 49 years | 50,399 | 50,821 | 101,220 |
| 50 to 54 years | 52,939 | 53,950 | 106,889 |
| 55 to 59 years | 56,225 | 54,522 | 110,747 |
| 60 to 64 years | 48,169 | 52,923 | 101,092 |
| 65 to 69 years | 40,303 | 42,945 | 83,248 |
| 70 to 74 years | 30,464 | 37,435 | 67,899 |
| 75 to 79 years | 19,464 | 25,868 | 45,332 |
| 80 to 84 years | 12,516 | 17,002 | 29,518 |
| 85 years and over | 11,813 | 21,780 | 33,593 |
Things to know
What is the population of Middlesex County, MA under 18?
Middlesex County's population under the age of 18 is 318,468, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 19.62% of the total resident population of Middlesex County, MA.
What is the aging population in Middlesex County, MA?
Middlesex County's population aged 65 years and above was 259,590. As per the U.S. Census Bureau's American Community Survey, this population is 16% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates