Sullivan County's estimated 2026 population is 43,998 with a growth rate of 0.08% in the past year according to the most recent United States census data. Sullivan County is the 9th largest county in New Hampshire. The 2010 population was 43,744 and has seen a growth of 0.58% since that time.
Data after 2023 is projected based on recent change
Overall: 47 years
Female: 48 years
Male: 46 years
There are 35,958 adults, (10,288 of whom are seniors) in Sullivan County.
Female: 21,680 (49.6%)
Male: 22,035 (50.4%)
The racial composition of Sullivan County includes 92.13% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 40,275 | 92.13% |
| Two or more races | 2,440 | 5.58% |
| Other race | 507 | 1.16% |
| Black or African American | 339 | 0.78% |
| Asian | 125 | 0.29% |
| Native American | 21 | 0.05% |
| Native Hawaiian or Pacific Islander | 8 | 0.02% |
Sullivan County's average per capita income is $52,190. Household income levels show a median of $80,858. The poverty rate stands at 10.12%.
Name | Median | Mean |
|---|---|---|
| Married Families | $113,546 | - |
| Families | $100,458 | $127,321 |
| Households | $80,858 | $105,975 |
| Non Families | $49,455 | $68,075 |
Average Income
Median Household Income
Poverty Rate