Sullivan County, New Hampshire Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 9th-largest in New Hampshire
The population of Sullivan County, New Hampshire is 43,529 as of the 2023 American Community Survey, making it the 9th-largest county in New Hampshire. The median household income is $75,929, the median home value is $236,300, and the median age is 47.3.
The population of Sullivan County has grown 0.6% since 2010 (43,744 → 44,012), a +0.04% annualized rate.
43,529
Population
+0.04%
Annual growth
81
People / sq mi
$75,929
Median Income
$236,300
Median Home Value
Sullivan County covers 538 sq mi of land at 80.9 people per square mile.
About Sullivan County, NH
Sullivan County is a county in New Hampshire with a population of 43,529. It ranks #9 among counties in New Hampshire by population. The median age is 47.3, older than the national median. The population is 50.2% male and 49.8% female.
The median household income in Sullivan County is $75,929, near the US median of $74,580. 7.0% of residents live below the federal poverty level. Home values sit at a median of $236,300, with monthly rent averaging $1,159. The homeownership rate of 74.8% is higher than the national rate of 64.8%.
Educational attainment in Sullivan County reflects 30.5% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.6% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 25.9 minutes each way.
Sullivan County Population History (2010-2024)
The county of Sullivan County had a population of 43,744 in 2010 and 44,012 in 2024, a 0.6% growth over 14 years. The peak was 44,012 in 2024. Average annual growth rate: 0.04%.
44,012
Population (2024)
43,744
Population (2010)
44,012
Peak (2024)
0.04%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 43,744 |
| 2011 | 43,509 |
| 2012 | 43,240 |
| 2013 | 43,069 |
| 2014 | 43,177 |
| 2015 | 43,175 |
| 2016 | 43,088 |
| 2017 | 43,053 |
| 2018 | 43,194 |
| 2019 | 43,263 |
| 2020 | 43,069 |
| 2021 | 43,609 |
| 2022 | 43,881 |
| 2023 | 44,006 |
| 2024 | 44,012 |
Race & Ethnicity
| White | 92.3% |
| Black or African American | 0.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.4% |
| Two or More Races | 0.0% |
Age & Sex
47.3
Median Age
49.8%
Female
50.2%
Male
23.1%
Age 65+
Age Distribution
Children (under 15): 14.7% · Seniors (65+): 23.1%
Income & Poverty
| Median household income | $75,929$-19,699 vs state |
| Mean household income | $102,029 |
| Per-capita income | $41,921 |
| Poverty rate | 7.0%+2.6% vs state |
| Unemployment rate | 1.3% |
| Employment-to-population | 56.7% |
Top Industries by Employment
The largest employment sector in Sullivan County is professional & business services, accounting for 28.7% of workers.
How residents commute
0.1%
Drive alone
2.4%
Carpool
77.5%
Public transit
9.6%
Work from home
25.9 min
Avg commute
Housing
$236,300$-130,900 vs state
Median home value
$1,159
Median rent
74.8%
Homeownership rate
21,905
Total housing units
73.4%
Occupied
26.6%
Vacant
25.2%
Renter-occupied
Social & access
93.6%
With health insurance
92.7%
With broadband internet
43.7%
Foreign-born
9.3%
Veterans (18+)
14.7%
With a disability
97.6%
Speak language other than English at home
Education
91.1%
High School+
30.5%
Bachelor's+
Largest cities in New Hampshire
Other counties in New Hampshire
Part of New Hampshire
Metro areas in New Hampshire
County rankings
Frequently Asked Questions
Sullivan County, New Hampshire has a population of 43,529 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 9th-largest county in New Hampshire. Population density is 81 people per square mile.
The population of Sullivan County has grown 0.6% since 2010 (43,744 → 44,012), a +0.04% annualized rate.
The median household income in Sullivan County, New Hampshire is $75,929, with mean (average) household income of $102,029 and per-capita income of $41,921. 7.0% of residents live below the federal poverty level.
In Sullivan County, the largest racial and ethnic groups are White (92.3%), Hispanic or Latino (1.4%), Black or African American (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Sullivan County, New Hampshire is 47.3 years. Residents are 49.8% female and 50.2% male.
The median home value in Sullivan County is $236,300 and median monthly rent is $1,159. 74.8% of occupied housing units are owner-occupied. The county has 21,905 total housing units, 26.6% of which are vacant.
The largest employment sector in Sullivan County, New Hampshire is professional, scientific, and management services, employing 28.7% of workers. The unemployment rate is 1.3%.
Manchester is among the largest cities associated with Sullivan County, New Hampshire, with a population of 115,415.
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Full rankings of New Hampshire counties
Statewide data for New Hampshire
Population, race, income, age, and trends across New Hampshire
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.