Hillsborough County, New Hampshire Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 1st-largest in New Hampshire

The population of Hillsborough County, New Hampshire is 424,732 as of the 2023 American Community Survey, making it the 1st-largest county in New Hampshire. The median household income is $100,436, the median home value is $385,500, and the median age is 41.0.

The population of Hillsborough County has grown 7.3% since 2010 (401,064 → 430,462), a +0.51% annualized rate.

Hillsborough County within New Hampshire · Source: US Census TIGER/Line via us-atlas

424,732

Population

+0.51%

Annual growth

485

People / sq mi

$100,436

Median Income

$385,500

Median Home Value

Hillsborough County covers 877 sq mi of land at 484.6 people per square mile.

About Hillsborough County, NH

Hillsborough County is a county in New Hampshire with a population of 424,732. It ranks #1 among counties in New Hampshire by population. The median age is 41.0, older than the national median. The population is 50.1% male and 49.9% female.

The median household income in Hillsborough County is $100,436, above the US median of $74,580. 4.1% of residents live below the federal poverty level. Home values sit at a median of $385,500, with monthly rent averaging $1,532. The homeownership rate of 67.5% is higher than the national rate of 64.8%.

Educational attainment in Hillsborough County reflects 40.6% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 16.1% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 27.1 minutes each way.

Hillsborough County Population History (2010-2024)

The county of Hillsborough County had a population of 401,064 in 2010 and 430,462 in 2024, a 7.3% growth over 14 years. The peak was 430,462 in 2024. Average annual growth rate: 0.51%.

430,462

Population (2024)

401,064

Population (2010)

430,462

Peak (2024)

0.51%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	401,064	-	-	estimate
2011	402,832	+1,768	+0.44%	estimate
2012	404,439	+1,607	+0.40%	estimate
2013	405,417	+978	+0.24%	estimate
2014	407,455	+2,038	+0.50%	estimate
2015	409,229	+1,774	+0.44%	estimate
2016	411,591	+2,362	+0.58%	estimate
2017	413,545	+1,954	+0.47%	estimate
2018	414,917	+1,372	+0.33%	estimate
2019	417,738	+2,821	+0.68%	estimate
2020	422,929	+5,191	+1.24%	estimate
2021	424,475	+1,546	+0.37%	estimate
2022	426,307	+1,832	+0.43%	estimate
2023	427,719	+1,412	+0.33%	estimate
2024	430,462	+2,743	+0.64%	estimate

Race & Ethnicity

White	83.3%
Black or African American	2.6%
Asian	0.0%
Hispanic or Latino (any race)	1.0%
Two or More Races	0.0%

Age & Sex

41.0

Median Age

49.9%

Female

50.1%

Male

16.7%

Age 65+

Age Distribution

Under 5

5.1%

5–9

5.2%

10–14

5.9%

15–19

6.0%

20–24

6.0%

25–34

14.1%

35–44

12.9%

45–54

13.2%

55–59

7.4%

60–64

7.6%

65–74

10.1%

75–84

4.8%

85+

1.8%

Children (under 15): 16.2% · Seniors (65+): 16.7%

Income & Poverty

Median household income	$100,436+$4,808 vs state
Mean household income	$128,567
Per-capita income	$52,243
Poverty rate	4.1%-0.3% vs state
Unemployment rate	2.3%
Employment-to-population	68.1%

Top Industries by Employment

Professional & business services

22.9%

Manufacturing

14.5%

Finance & real estate

13.4%

Construction

7.3%

Education & health care

6.8%

Information

6.6%

Retail trade

4.5%

Arts, entertainment & food

3.9%

The largest employment sector in Hillsborough County is professional & business services, accounting for 22.9% of workers.

How residents commute

0.6%

Drive alone

1.7%

Carpool

72.9%

Public transit

16.1%

Work from home

27.1 min

Avg commute

Housing

$385,500+$18,300 vs state

Median home value

$1,532

Median rent

67.5%

Homeownership rate

176,753

Total housing units

94.9%

Occupied

5.1%

Vacant

32.5%

Renter-occupied

Social & access

94.0%

With health insurance

96.0%

With broadband internet

47.8%

Foreign-born

7.1%

Veterans (18+)

11.7%

With a disability

85.8%

Speak language other than English at home

Education

93.0%

High School+

40.6%

Bachelor's+

Largest cities in New Hampshire

Manchester (115,415)Nashua (91,131)Concord (44,219)Dover (33,070)Rochester (32,866)Keene (22,923)Portsmouth (22,332)Derry (21,668)Laconia (16,982)Lebanon (14,759)All New Hampshire cities →

Other counties in New Hampshire

Rockingham County (317,163)Merrimack County (155,018)Strafford County (131,743)Grafton County (91,759)Cheshire County (76,945)Belknap County (64,300)Carroll County (51,259)Sullivan County (43,529)Coos County (31,386)All New Hampshire counties →

Part of New Hampshire

New Hampshire demographic profile All New Hampshire data →

Metro areas in New Hampshire

Boston (4,917,661)Manchester (424,732)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Common questions about Hillsborough County, NH

What is the population of Hillsborough County, NH?What is the median household income in Hillsborough County, NH?What is the median home value in Hillsborough County, NH?What are the demographics of Hillsborough County, NH?What is the cost of living in Hillsborough County, NH?Is Hillsborough County, NH growing?

Frequently Asked Questions

Hillsborough County, New Hampshire has a population of 424,732 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 1st-largest county in New Hampshire. Population density is 485 people per square mile.

The population of Hillsborough County has grown 7.3% since 2010 (401,064 → 430,462), a +0.51% annualized rate.

The median household income in Hillsborough County, New Hampshire is $100,436, with mean (average) household income of $128,567 and per-capita income of $52,243. 4.1% of residents live below the federal poverty level.

In Hillsborough County, the largest racial and ethnic groups are White (83.3%), Black or African American (2.6%), Hispanic or Latino (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Hillsborough County, New Hampshire is 41.0 years. Residents are 49.9% female and 50.1% male.

The median home value in Hillsborough County is $385,500 and median monthly rent is $1,532. 67.5% of occupied housing units are owner-occupied. The county has 176,753 total housing units, 5.1% of which are vacant.

The largest employment sector in Hillsborough County, New Hampshire is professional, scientific, and management services, employing 22.9% of workers. The unemployment rate is 2.3%.

Manchester is among the largest cities associated with Hillsborough County, New Hampshire, with a population of 115,415.