How many people live in Baltimore County, MD?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 852,400 people living in Baltimore County, MD. That makes Baltimore County the third-most populous county in Maryland. It is home to 13.6% of people living in the state.
852K
population of Baltimore County, MD (2024)
13.6%
County share of the Maryland population (2024)
About 852,400 people lived in Baltimore County, MD in 2024.
Population estimates, 2000–2024
What are Baltimore County, MD’s age demographics?
About 162,000 Baltimore County, MD residents are aged 65 and older in 2024. That represents 19% of its population. For comparison, the age group represents 17.7% of Maryland’s population and 18% in the US overall.
Another 183,900 Baltimore County residents, or 21.6% 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 Baltimore County, MD's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Baltimore County, MD’s racial and ethnic demographics?
Non-Hispanic Black or African American residents make up 31.4% of the Baltimore County, MD population, higher than the national share of 12.6%. Baltimore County, MD also has a larger share of people identifying as non-Hispanic Asian (6.7%) than the US overall (6.5%).
In contrast, Baltimore County’s Hispanic population accounts for 8.4%, below the 20% nationwide, and the non-Hispanic white population makes up 50.5% of the county, compared with 57.5% 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.
Baltimore County, MD has a higher share of a non-Hispanic white population than Maryland as a whole.
Population estimates by race and ethnicity, (2024)
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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.
