Sullivan County, New Hampshire Demographics 2026

Population Overview

Sullivan County is located in New Hampshire with a total population of 43,529. It is the 9th most populous county out of 10 in New Hampshire. The county encompasses 1 Census-designated place.

Age Demographics

The median age in Sullivan County is 47.3 years. This is 9% higher than the state median of 43.2 years.

Economy, Income & Housing

The median household income in Sullivan County is $75,929. This is 21% lower than the state median of $95,628. Compared to the national median of $78,538, household income here is 3% lower. The poverty rate stands at 10.8%. This is 51% higher than the state poverty rate of 7.2%. The unemployment rate is 2.3%. This is 32% lower than the state rate of 3.4%. The median home value is $236,300. Housing costs are 36% lower than the state median of $367,200. The home-value-to-income ratio is 3.1x. 74.8% of occupied housing units are owner-occupied. This homeownership rate is 3% higher than the state average of 72.5%.

Race & Ethnicity

Sullivan County has a predominantly White (non-Hispanic) population, comprising 91.8% of all residents. Hispanic or Latino residents account for 2.0%. The Hispanic or Latino population (2.0%) is well below the state average of 4.5%. The Asian population (0.5%) is well below the state average of 2.6%.

Education

30.5% 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 23% lower than the state rate of 39.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.1%.