How many people live in Harford County, MD?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 265,500 people living in Harford County, MD. That makes Harford County the eighth-most populous county in Maryland. It is home to 4.2% of people living in the state.
266K
population of Harford County, MD (2024)
4.2%
County share of the Maryland population (2024)
About 265,500 people lived in Harford County, MD in 2024.
Population estimates, 2000–2024
What are Harford County, MD’s age demographics?
About 49,200 Harford County, MD residents are aged 65 and older in 2024. That represents 18.5% of its population. For comparison, the age group represents 17.7% of Maryland’s population and 18% in the US overall.
Another 58,300 Harford County residents, or 21.9% 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 Harford County, MD's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Harford County, MD’s racial and ethnic demographics?
Non-Hispanic white residents make up 71.5% of the Harford County, MD population, higher than the national share of 57.5%. Harford County, MD also has a larger share of people identifying as non-Hispanic Black or African American (15.8%) than the US overall (12.6%).
In contrast, Harford County’s Hispanic population accounts for 6.2%, below the 20% nationwide, and the non-Hispanic Asian population makes up 3.3% of the county, compared with 6.5% 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.
Harford 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 Harford County, MD is Aberdeen with about 18,500 residents in 2024.
Cities and towns in Harford County, MD ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Aberdeen | 18,451 |
| 2. | Havre de Grace | 15,222 |
| 3. | Bel Air | 10,395 |
| 4. | Balance of Harford County | 221,446 |
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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.
