Sullivan County is home to 43,715 people in New Hampshire. The median age is 47.0, about 8 years above the US median. That puts it in the top 5% of US counties for household income. The foreign-born share is 2%. 75% of homes are owner-occupied. That trails the New Hampshire median by roughly 18%.
At a glance
Average income
median household income $80,858, near the US median
US median: $82,259
Older
median age 47.0
US median: 38.9
Average education
30% hold a bachelor's degree
US average: 36%
Less affordable
home values up 65%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Sullivan County
What changed most since 1990
White share98.7% → 91.4%(−7.3 pts)US over the same years: −17.8 pts
Median age35.3 → 47.0(+11.7 years)US over the same years: +6.0 years
Median home value (2024 dollars)$218,886 → $268,700(+23%)US over the same years: +67%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)18.2%(658)
US avg: 26.4%
Gulf War (1990s)18.7%(677)
US avg: 24.3%
Vietnam era33.5%(1,211)
US avg: 33.1%
Korean War5.6%(204)
US avg: 4.5%
World War II0.4%(13)
US avg: 1%
Share of the 3,617 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Sullivan County, decade by decade
Sullivan County population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
38,592
$69,729
$218,886
16.5%
3.2
2000
40,458
$74,575
$163,220
19.7%
5.9
2010
43,742
$72,920
$261,532
25.9%
9.2
2020
43,063
$77,280
$211,380
29.6%
21.7
2024
43,715
$80,858
$268,700
30.3%
20.0
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
How many people live in Sullivan County, New Hampshire?
Sullivan County, New Hampshire has about 43,715 residents according to the 2024 American Community Survey.
What is the median household income in Sullivan County, New Hampshire?
The typical household in Sullivan County, New Hampshire earns about $80,858 a year. Half of households make more than that, and half make less.
Is Sullivan County, New Hampshire expensive?
In Sullivan County, New Hampshire, the median home is worth about $268,700, and the typical rent is about $1,211 a month.
How educated are people in Sullivan County, New Hampshire?
About 30.3% of adults age 25 and over in Sullivan County, New Hampshire hold a bachelor's degree or higher.
What is the poverty rate in Sullivan County, New Hampshire?
About 10.1% of people in Sullivan County, New Hampshire live below the federal poverty line.
Has Sullivan County, New Hampshire grown since 1990?
Yes, Sullivan County, New Hampshire has grown since 1990. The population has added about 5,123 residents, a change of about 13 percent over that period.
