How many people live in Northumberland County, VA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 12,400 people living in Northumberland County, VA. That makes Northumberland County the 107th-most populous county in Virginia. It is home to 0.14% of people living in the state.
12.4K
population of Northumberland County, VA (2024)
0.14%
County share of the Virginia population (2024)
About 12,400 people lived in Northumberland County, VA in 2024.
Population estimates, 2000–2024
What are Northumberland County, VA’s age demographics?
About 4,800 Northumberland County, VA residents are aged 65 and older in 2024. That represents 38.9% of its population. For comparison, the age group represents 17.8% of Virginia’s population and 18% in the US overall.
Another 1,700 Northumberland County residents, or 13.6% of the population, were children under 18. For comparison, the age group represents 21.6% of Virginia’s population and 21.6% in the US overall.
A higher share of Northumberland County, VA's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Northumberland County, VA’s racial and ethnic demographics?
Non-Hispanic white residents make up 70.1% of the Northumberland County, VA population, higher than the national share of 57.5%. Northumberland County also has a larger share of people identifying as non-Hispanic Black or African American (23.2%) than the US overall (12.6%).
In contrast, Northumberland County’s Hispanic population accounts for 4%, below the 20% nationwide, and the non-Hispanic Asian population makes up 0.66% 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.
Northumberland County, VA has a higher share of a non-Hispanic white population than Virginia as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Northumberland County, VA is Kilmarnock with about 73 residents in 2024.
Cities and towns in Northumberland County, VA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Kilmarnock (pt.) | 73 |
| 2. | Balance of Northumberland County | 12,324 |
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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.
