How many people live in Hillsborough County, NH?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 430,500 people living in Hillsborough County, NH. That makes Hillsborough County the most populous county in New Hampshire. It is home to 30.4% of people living in the state.
430K
population of Hillsborough County, NH (2024)
30.4%
County share of the New Hampshire population (2024)
About 430,500 people lived in Hillsborough County, NH in 2024.
Population estimates, 2000–2024
What are Hillsborough County, NH’s age demographics?
About 79,700 Hillsborough County, NH residents are aged 65 and older in 2024. That represents 18.5% of its population. For comparison, the age group represents 21.5% of New Hampshire’s population and 18% in the US overall.
Another 82,100 Hillsborough County, NH residents, or 19.1% of the population, were children under 18. For comparison, the age group represents 17.7% of New Hampshire’s population and 21.6% in the US overall.
A lower share of Hillsborough County, NH's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Hillsborough County, NH’s racial and ethnic demographics?
Non-Hispanic white residents make up 80.9% of the Hillsborough County, NH population, higher than the national share of 57.5%.
In contrast, Hillsborough County’s Hispanic population accounts for 9.1%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 2.9% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Hillsborough County, NH has a higher share of a Hispanic population than New Hampshire as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Hillsborough County, NH is Manchester with about 116,400 residents in 2024.
Cities and towns in Hillsborough County, NH ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Manchester | 116,386 |
| 2. | Nashua | 91,851 |
| 3. | Merrimack | 29,367 |
| 4. | Hudson | 25,787 |
| 5. | Bedford | 23,856 |
| 6. | Goffstown | 18,488 |
| 7. | Milford | 16,530 |
| 8. | Pelham | 14,685 |
| 9. | Amherst | 11,914 |
| 10. | Weare | 9,220 |
Keep exploring
Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
