Hillsborough County's estimated 2026 population is 435,948 with a growth rate of 0.63% in the past year according to the most recent United States census data. Hillsborough County is the largest county in New Hampshire. The 2010 population was 401,064 and has seen a growth of 8.7% since that time.
Data after 2023 is projected based on recent change
The racial composition of Hillsborough County includes 83.3% White, 4.23% Asian, and smaller percentages for Black or African American, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (83.3%)
Two or more races (7.66%)
Asian (4.23%)
Black or African American (2.58%)
Other race (2.09%)
Native American (0.13%)
Native Hawaiian or Pacific Islander (0.01%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 353,822 | 83.3% |
| Two or more races | 32,528 | 7.66% |
| Asian | 17,966 | 4.23% |
| Black or African American | 10,947 | 2.58% |
| Other race | 8,878 | 2.09% |
| Native American | 545 | 0.13% |
| Native Hawaiian or Pacific Islander | 46 | 0.01% |
Married
Widowed
Divorced
Separated
Never Married
Hillsborough County's average per capita income is $60,336. Household income levels show a median of $100,436. The poverty rate stands at 6.51%.
Name | Median | Mean |
|---|---|---|
| Married Families | $140,704 | $169,039 |
| Families | $124,104 | $151,795 |
| Households | $100,436 | $128,567 |
| Non Families | $60,699 | $79,527 |
Average Income
Median Household Income
Poverty Rate