St. Clair County, Michigan Age & Gender Distribution (2024)
Population distribution by age and gender for St. Clair County, Michigan
St. Clair County, Michigan Age & Gender Statistics (2024)
Total Population
160,221
Median Age
44.5
Male Median
43.4
Female Median
45.5
St. Clair County, Michigan Population Growth
St. Clair County, Michigan Demographic Trend
Since 2010, the population of has changed by -3.3%%.
-3.3%% Growth
St. Clair County, Michigan Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
St. Clair County, Michigan Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 44.5 | 160,221 |
| 2023 | 44.3 | 160,089 |
| 2022 | 44.1 | 160,257 |
| 2021 | 44.1 | 160,067 |
| 2020 | 44.0 | 159,285 |
| 2019 | 43.8 | 159,247 |
| 2018 | 43.5 | 159,566 |
| 2017 | 43.2 | 159,761 |
| 2016 | 42.9 | 160,069 |
| 2015 | 42.8 | 160,429 |
| 2014 | 42.4 | 161,008 |
| 2013 | 41.9 | 161,865 |
| 2012 | 41.3 | 162,978 |
| 2011 | 40.6 | 164,374 |
| 2010 | 40.2 | 165,719 |
St. Clair County, Michigan Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.8% |
| 5–17 | 15.4% |
| 18–24 | 7.6% |
| 25–34 | 11.4% |
| 35–54 | 24.5% |
| 55–64 | 15.9% |
| 65+ | 20.4% |
Dependency Ratios for St. Clair County, Michigan
- Total Dependency Ratio:
- 68.5
- Youth Dependency:
- 34.2
- Old-Age Dependency:
- 34.3
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for St. Clair County, Michigan
The median age in St. Clair County, Michigan is 44.5 years.
According to latest Census data, the total population of St. Clair County, Michigan is 160,221.
In St. Clair County, Michigan, seniors (ages 65+) make up 20.4% of the population, while children under 18 represent 15.4%.
Based on historical data since 2010, the population in St. Clair County, Michigan is aging.