Sanilac County, Michigan Age & Gender Distribution (2024)
Population distribution by age and gender for Sanilac County, Michigan
Sanilac County, Michigan Age & Gender Statistics (2024)
Total Population
40,462
Median Age
45.5
Male Median
44.7
Female Median
46.3
Sanilac County, Michigan Population Growth

Sanilac County, Michigan Demographic Trend
Since 2010, the population of has changed by -8.1%%.
-8.1%% Growth
Sanilac County, Michigan Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Sanilac County, Michigan Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 45.5 | 40,462 |
| 2023 | 45.3 | 40,574 |
| 2022 | 45.2 | 40,759 |
| 2021 | 45.3 | 40,829 |
| 2020 | 45.4 | 41,179 |
| 2019 | 45.2 | 41,295 |
| 2018 | 45.1 | 41,376 |
| 2017 | 44.8 | 41,535 |
| 2016 | 44.6 | 41,761 |
| 2015 | 44.2 | 42,014 |
| 2014 | 43.6 | 42,301 |
| 2013 | 43.2 | 42,637 |
| 2012 | 42.7 | 43,096 |
| 2011 | 42.0 | 43,554 |
| 2010 | 41.4 | 44,010 |
Sanilac County, Michigan Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.0% |
| 5–17 | 16.0% |
| 18–24 | 7.3% |
| 25–34 | 10.3% |
| 35–54 | 22.6% |
| 55–64 | 15.6% |
| 65+ | 23.2% |
Dependency Ratios for Sanilac County, Michigan
- Total Dependency Ratio:
- 79.2
- Youth Dependency:
- 37.5
- Old-Age Dependency:
- 41.6
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Sanilac County, Michigan
The median age in Sanilac County, Michigan is 45.5 years.
According to latest Census data, the total population of Sanilac County, Michigan is 40,462.
In Sanilac County, Michigan, seniors (ages 65+) make up 23.2% of the population, while children under 18 represent 16.0%.
Based on historical data since 2010, the population in Sanilac County, Michigan is aging.