Montgomery County, Maryland Age & Gender Distribution (2024)
Population distribution by age and gender for Montgomery County, Maryland
Montgomery County, Maryland Age & Gender Statistics (2024)
Total Population
1,065,949
Median Age
40.2
Male Median
38.9
Female Median
41.5
Montgomery County, Maryland Population Growth

Montgomery County, Maryland Demographic Trend
Since 2010, the population of has changed by +12.5%%.
+12.5%% Growth
Montgomery County, Maryland Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Montgomery County, Maryland Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 40.2 | 1,065,949 |
| 2023 | 40.1 | 1,057,586 |
| 2022 | 39.8 | 1,056,910 |
| 2021 | 39.6 | 1,057,201 |
| 2020 | 39.4 | 1,047,661 |
| 2019 | 39.2 | 1,043,530 |
| 2018 | 39.0 | 1,040,133 |
| 2017 | 38.8 | 1,039,198 |
| 2016 | 38.6 | 1,026,371 |
| 2015 | 38.5 | 1,017,859 |
| 2014 | 38.5 | 1,005,087 |
| 2013 | 38.4 | 989,474 |
| 2012 | 38.4 | 974,824 |
| 2011 | 38.3 | 959,738 |
| 2010 | 38.2 | 947,230 |
Montgomery County, Maryland Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.7% |
| 5–17 | 17.1% |
| 18–24 | 7.8% |
| 25–34 | 12.0% |
| 35–54 | 27.4% |
| 55–64 | 13.0% |
| 65+ | 17.0% |
Dependency Ratios for Montgomery County, Maryland
- Total Dependency Ratio:
- 66.1
- Youth Dependency:
- 37.9
- Old-Age Dependency:
- 28.2
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Montgomery County, Maryland
The median age in Montgomery County, Maryland is 40.2 years.
According to latest Census data, the total population of Montgomery County, Maryland is 1,065,949.
In Montgomery County, Maryland, seniors (ages 65+) make up 17.0% of the population, while children under 18 represent 17.1%.
Based on historical data since 2010, the population in Montgomery County, Maryland is aging.