Northumberland County's 2026 population is estimated at 12,415, reflecting a 0.07% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Northumberland County is the 107th largest county in Virginia. The 2010 population was 12,356 and has grown 0.48% since 2010.
Data after 2023 is projected based on recent change
Overall: 59.5 years
Female: 59.9 years
Male: 58.8 years
There are 10,503 adults, (4,636 of whom are seniors) in Northumberland County.
Female: 6,378 (52.3%)
Male: 5,810 (47.7%)
The racial composition of Northumberland County includes 69.33% White, 19.08% Black or African American, 4.37% Asian, and smaller percentages for other race, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 8,450 | 69.33% |
| Black or African American | 2,326 | 19.08% |
| Two or more races | 751 | 6.16% |
| Asian | 533 | 4.37% |
| Other race | 112 | 0.92% |
| Native American | 16 | 0.13% |
Northumberland County 's average per capita income is $44,156. Household income levels show a median of $66,480. The poverty rate stands at 11.54%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $98,425 | - |
| Families | $79,382 | $115,522 |
| Households | $66,480 | $93,845 |
| Non Families | $35,995 | $53,215 |
Average Income
Median Household Income
Poverty Rate