Hillsborough County's estimated 2026 population is 436,388 with a growth rate of 0.69% 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 8.81% since that time.
Data after 2023 is projected based on recent change
Overall: 41 years
Female: 41.9 years
Male: 40.1 years
There are 342,682 adults, (73,818 of whom are seniors) in Hillsborough County.
Female: 212,403 (49.8%)
Male: 213,975 (50.2%)
The racial composition of Hillsborough County includes 81.56% White, 4.31% Asian, and smaller percentages for other race, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 347,760 | 81.56% |
| Two or more races | 38,285 | 8.98% |
| Asian | 18,375 | 4.31% |
| Other race | 10,802 | 2.53% |
| Black or African American | 10,520 | 2.47% |
| Native American | 598 | 0.14% |
| Native Hawaiian or Pacific Islander | 38 | 0.01% |
Hillsborough County's average per capita income is $62,194. Household income levels show a median of $103,545. The poverty rate stands at 6.74%.
Name | Median | Mean |
|---|---|---|
| Married Families | $145,447 | $175,313 |
| Families | $127,500 | $157,057 |
| Households | $103,545 | $132,601 |
| Non Families | $62,267 | $81,616 |
Average Income
Median Household Income
Poverty Rate