Hillsborough County Flag

Hillsborough County

State:
New Hampshire
County Seat:

Hillsborough County's estimated 2025 population is 427,076 with a growth rate of -0.03% in the past year according to the most recent United States census data. Hillsborough County is the 1st largest county in New Hampshire. The 2010 population was 401,064 and has seen a growth of 6.49% since that time.

427,076
Total Population
487
Population Density (mi²)
1
Population Rank (State)
-139 -0.03%
Annual Population Growth

Hillsborough County Population

Demographics

Economics and Income Statistics