Sullivan County, New Hampshire Demographics 2026
Sullivan County, New Hampshire has a population of 43,715, the 9th most populous county in New Hampshire. The median household income is $80,858 and the median home value is $268,700. The poverty rate is 10.1%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Sullivan County Quick Facts
How Sullivan County Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 43,529 | 43,715 | +0.4% |
| Median household income | $75,929 | $80,858 | +6.5% |
| Median home value | $236,300 | $268,700 | +13.7% |
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 24 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Sullivan County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Claremont | 13,078 | $59,096 | 13.6% | $204,600 |
| Newport | 4,758 | $78,174 | 14.8% | $211,200 |
| Charlestown | 659 | $31,078 | 46.6% | $119,800 |
| Plainfield | 220 | $109,500 | 0.0% | $455,600 |
Explore New Hampshire Rankings
Population Overview
Sullivan County is located in New Hampshire with a total population of 43,715. It is the 9th most populous county out of 10 in New Hampshire. The county encompasses 4 Census-designated places.
Age Demographics
The median age in Sullivan County is 47.0 years. This is 9% higher than the state median of 43.3 years.
Economy, Income & Housing
The median household income in Sullivan County is $80,858. This is 18% lower than the state median of $99,031. It is also about the same as the national median of $80,734. The poverty rate stands at 10.1%. This is 40% higher than the state poverty rate of 7.2%. The unemployment rate is 3.1%. This is 8% lower than the state rate of 3.4%. The median home value is $268,700. Housing costs are 33% lower than the state median of $402,500. The home-value-to-income ratio is 3.3x. 75.4% of occupied housing units are owner-occupied. This homeownership rate is 4% higher than the state average of 72.8%.
Race & Ethnicity
Sullivan County has a predominantly White (non-Hispanic) population, comprising 91.4% of all residents. Hispanic or Latino residents account for 2.1%. The Hispanic or Latino population (2.1%) is well below the state average of 4.7%. The Asian population (0.3%) is well below the state average of 2.6%.
Education
30.3% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 25% lower than the state rate of 40.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.1%.
Data Sources & Methodology
All figures for Sullivan County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against New Hampshire and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of Sullivan County, New Hampshire?
Sullivan County has a population of 43,715, making it the 9th most populous county in New Hampshire.
What is the median income in Sullivan County?
The median household income in Sullivan County is $80,858 with a poverty rate of 10.1%.
How many cities are in Sullivan County, New Hampshire?
Sullivan County contains 4 Census-designated places.