Hillsborough County, New Hampshire Demographics 2026

Population Overview

Hillsborough County is located in New Hampshire with a total population of 424,732. It is the 1st most populous county out of 10 in New Hampshire. The county encompasses 2 Census-designated places.

Age Demographics

The median age in Hillsborough County is 41.0 years. This is 5% lower than the state median of 43.2 years.

Economy, Income & Housing

The median household income in Hillsborough County is $100,436. This is 5% higher than the state median of $95,628. Compared to the national median of $78,538, household income here is 28% higher. The poverty rate stands at 6.5%. This is 9% lower than the state poverty rate of 7.2%. The unemployment rate is 3.3%. The median home value is $385,500. Housing costs are 5% higher than the state median of $367,200. The home-value-to-income ratio is 3.8x. 67.5% of occupied housing units are owner-occupied. This homeownership rate is 7% lower than the state average of 72.5%.

Race & Ethnicity

The largest racial or ethnic group in Hillsborough County is White (non-Hispanic), making up 81.0% of the population. Hispanic or Latino residents account for 8.3%. The Black or African American population is significantly higher than the state average (2.3% vs 1.4%). The Hispanic or Latino population is significantly higher than the state average (8.3% vs 4.5%). The Asian population is significantly higher than the state average (4.2% vs 2.6%).

Education

40.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 2% higher 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 93.0%. Notably, 15.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.