How many people live in Montgomery County, MD?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 1.08 million people living in Montgomery County, MD. That makes Montgomery County the 44th-most populous county in the US. It is also the largest in Maryland, accounting for 17.3% of the state’s population.
1.08M
population of Montgomery County, MD (2024)
17.3%
County share of the Maryland population (2024)
About 1.08 million people lived in Montgomery County, MD in 2024.
Population estimates, 2000–2024
What are Montgomery County, MD’s age demographics?
About 194,400 Montgomery County, MD residents are aged 65 and older in 2024. That represents 18% of its population. For comparison, the age group represents 17.7% of Maryland’s population and 18% in the US overall.
Another 243,500 Montgomery County residents, or 22.5% of the population, were children under 18. For comparison, the age group represents 22% of Maryland’s population and 21.6% in the US overall.
A higher share of Montgomery County, MD's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Montgomery County, MD’s racial and ethnic demographics?
Hispanic residents make up 21.7% of the Montgomery County, MD population, higher than the national share of 20%. Montgomery County, MD also has a larger share of people identifying as non-Hispanic Black or African American (19.4%) than the US overall (12.6%).
In contrast, Montgomery County’s non-Hispanic white population accounts for 39.6%, below the 57.5% nationwide, and the non-Hispanic American Indian and Alaska Native population makes up 0.16% of the county, compared with 0.72% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Montgomery County, MD has a higher share of a non-Hispanic Asian population than Maryland as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Montgomery County, MD is Gaithersburg with about 70,700 residents in 2024.
Cities and towns in Montgomery County, MD ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Gaithersburg | 70,686 |
| 2. | Rockville | 68,417 |
| 3. | Takoma Park | 17,856 |
| 4. | Poolesville | 5,856 |
| 5. | Chevy Chase | 2,927 |
| 6. | Kensington | 2,155 |
| 7. | Chevy Chase Village | 2,071 |
| 8. | Somerset | 1,203 |
| 9. | Chevy Chase View | 1,017 |
| 10. | Garrett Park | 1,004 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
