How many people live in Frederick County, MD?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 299,300 people living in Frederick County, MD. That makes Frederick County the seventh-most populous county in Maryland. It is home to 4.8% of people living in the state.
299K
population of Frederick County, MD (2024)
4.8%
County share of the Maryland population (2024)
About 299,300 people lived in Frederick County, MD in 2024.
Population estimates, 2000–2024
What are Frederick County, MD’s age demographics?
About 47,900 Frederick County residents are aged 65 and older in 2024. That represents 16% of its population. For comparison, the age group represents 17.7% of Maryland’s population and 18% in the US overall.
Another 69,100 Frederick County residents, or 23.1% 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 lower share of Frederick County, MD's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Frederick County, MD’s racial and ethnic demographics?
Non-Hispanic white residents make up 64% of the Frederick County, MD population, higher than the national share of 57.5%. Frederick County, MD also has a larger share of people identifying as non-Hispanic Asian (7.1%) than the US overall (6.5%).
In contrast, Frederick County’s Hispanic population accounts for 13.7%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 11.8% of the county, compared with 12.6% 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.
Frederick County, MD has a higher share of a non-Hispanic white population than Maryland as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Frederick County, MD is Frederick with about 89,500 residents in 2024.
Cities and towns in Frederick County, MD ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Frederick | 89,537 |
| 2. | Brunswick | 9,015 |
| 3. | Walkersville | 6,535 |
| 4. | Thurmont | 6,308 |
| 5. | Middletown | 5,055 |
| 6. | Mount Airy (pt.) | 3,563 |
| 7. | Emmitsburg | 2,920 |
| 8. | Myersville | 1,865 |
| 9. | New Market | 1,609 |
| 10. | Woodsboro | 1,114 |
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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.
