St. Clair County, MI population age distributions
A complete breakdown of St. Clair 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 | 7,885 | 4.92% |
| 5 to 9 years | 8,396 | 5.24% |
| 10 to 14 years | 10,168 | 6.34% |
| 15 to 19 years | 10,079 | 6.29% |
| 20 to 24 years | 9,129 | 5.7% |
| 25 to 29 years | 9,266 | 5.78% |
| 30 to 34 years | 8,602 | 5.37% |
| 35 to 39 years | 8,820 | 5.5% |
| 40 to 44 years | 9,449 | 5.9% |
| 45 to 49 years | 10,172 | 6.35% |
| 50 to 54 years | 11,624 | 7.25% |
| 55 to 59 years | 13,451 | 8.39% |
| 60 to 64 years | 12,197 | 7.61% |
| 65 to 69 years | 11,105 | 6.93% |
| 70 to 74 years | 7,771 | 4.85% |
| 75 to 79 years | 5,559 | 3.47% |
| 80 to 84 years | 3,253 | 2.03% |
| 85 years and over | 3,331 | 2.08% |
TABLE OF CONTENTS
St. Clair County, MI population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
St. Clair County, MI population by age group.
The largest age group is 55 to 59 years with a population of 13,451 (8.39% of the total population).
The largest age group in St. Clair County, MI was for the group of age 55 to 59 years with a population of 13,451 (8.39%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in St. Clair County, MI was the 80 to 84 years with a population of 3,253 (2.03%).
St. Clair County, MI population by age cohort
To better understand the age distribution of St. Clair County, MI'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
St. Clair County, MI population by age cohort
The largest age group was 18 to 64 years with a population of 96,333 (60.11% of the total population).
St. Clair County, MI population by age cohort
Here's the population for each of the three cohorts.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 18 years | 32,905 | 20.53% |
| 18 to 64 years | 96,333 | 60.11% |
| 65 years and over | 31,019 | 19.36% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- St. Clair County 's population under 18 was 20.53%, compared to the 22.11% nationwide.
- St. Clair County's working population (between 18 and 64) was 60.11%, compared to 61.36% nationwide.
- St. Clair County's elderly or the senior population (over 65 age) was 19.36% as compared to 16.53% nationwide.
St. Clair County, MI population pyramid
Population pyramid for St. Clair County, MI 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 St. Clair County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for St. Clair County, MI, is 25.7.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for St. Clair County, MI, is 30.2.
- Total dependency ratio for St. Clair County, MI is 55.9.
- Potential support ratio, which is the number of youth (working age population) per elderly, for St. Clair County, MI is 3.3.
FIGURE 3
St. Clair County, MI population pyramid
St. Clair County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
St. Clair County, MI population pyramid
Here's the St. Clair County, MI's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 4,030 | 3,855 | 7,885 |
| 5 to 9 years | 4,124 | 4,272 | 8,396 |
| 10 to 14 years | 5,519 | 4,649 | 10,168 |
| 15 to 19 years | 5,260 | 4,819 | 10,079 |
| 20 to 24 years | 4,791 | 4,338 | 9,129 |
| 25 to 29 years | 4,819 | 4,447 | 9,266 |
| 30 to 34 years | 4,404 | 4,198 | 8,602 |
| 35 to 39 years | 4,332 | 4,488 | 8,820 |
| 40 to 44 years | 4,687 | 4,762 | 9,449 |
| 45 to 49 years | 5,150 | 5,022 | 10,172 |
| 50 to 54 years | 5,917 | 5,707 | 11,624 |
| 55 to 59 years | 6,821 | 6,630 | 13,451 |
| 60 to 64 years | 6,020 | 6,177 | 12,197 |
| 65 to 69 years | 5,430 | 5,675 | 11,105 |
| 70 to 74 years | 3,861 | 3,910 | 7,771 |
| 75 to 79 years | 2,404 | 3,155 | 5,559 |
| 80 to 84 years | 1,421 | 1,832 | 3,253 |
| 85 years and over | 1,283 | 2,048 | 3,331 |
Things to know
What is the population of St. Clair County, MI under 18?
St. Clair County's population under the age of 18 is 32,905, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 20.53% of the total resident population of St. Clair County, MI.
What is the aging population in St. Clair County, MI?
St. Clair County's population aged 65 years and above was 31,019. As per the U.S. Census Bureau's American Community Survey, this population is 19.36% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates