St. Mary's County, Maryland Age & Gender Distribution (2024)
Population distribution by age and gender for St. Mary's County, Maryland
St. Mary's County, Maryland Age & Gender Statistics (2024)
Total Population
115,126
Median Age
37.2
Male Median
36.3
Female Median
38.1
St. Mary's County, Maryland Population Growth
St. Mary's County, Maryland Demographic Trend
Since 2010, the population of has changed by +12.8%%.
+12.8%% Growth
St. Mary's County, Maryland Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
St. Mary's County, Maryland Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 37.2 | 115,126 |
| 2023 | 37.0 | 114,372 |
| 2022 | 37.0 | 113,814 |
| 2021 | 36.7 | 113,209 |
| 2020 | 36.5 | 113,182 |
| 2019 | 36.7 | 112,290 |
| 2018 | 36.5 | 111,531 |
| 2017 | 36.5 | 110,979 |
| 2016 | 36.3 | 110,675 |
| 2015 | 36.3 | 109,614 |
| 2014 | 36.1 | 108,472 |
| 2013 | 36.0 | 107,079 |
| 2012 | 36.0 | 105,528 |
| 2011 | 35.9 | 103,805 |
| 2010 | 35.7 | 102,086 |
St. Mary's County, Maryland Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.1% |
| 5–17 | 17.8% |
| 18–24 | 8.6% |
| 25–34 | 14.0% |
| 35–54 | 25.9% |
| 55–64 | 13.5% |
| 65+ | 14.0% |
Dependency Ratios for St. Mary's County, Maryland
- Total Dependency Ratio:
- 61.2
- Youth Dependency:
- 38.6
- Old-Age Dependency:
- 22.6
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for St. Mary's County, Maryland
The median age in St. Mary's County, Maryland is 37.2 years.
According to latest Census data, the total population of St. Mary's County, Maryland is 115,126.
In St. Mary's County, Maryland, seniors (ages 65+) make up 14.0% of the population, while children under 18 represent 17.8%.
Based on historical data since 2010, the population in St. Mary's County, Maryland has remained stable.