Sullivan County, NH demographics:
population, income, and more

Total population
43,715
0.4% year-over-year change
Median household income
$80,858/yr
6.5% year-over-year change
Housing units
21,958
0.2% year-over-year change

Sullivan County population

How many people live in Sullivan County

Sullivan County is home to 43,715 residents, according to the most recent Census data. Gender-wise, 50.4% of Sullivan County locals are male, and 49.6% are female.

Total population
43,715
0.4% year-over-year change
Gender ratio
Male
50.4%
22,035
Female
49.6%
21,680
Value Percent YoY change
Male 22,035 50.4% 0.8%
Female 21,680 49.6% 0.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Sullivan County is 47, with the population distributed as follows: about 14.3% are children under 15, then 10% are in the 15 to 24 age group. Adults between 25 and 44 make up 23.3% of the population, while another 28.9% fall into the 45 to 64 bracket. Finally, around 23.5% are 65 or older.

Median age
47
Age breakdown
Under 15
14.3%
15 to 24
10%
25 to 44
23.3%
45 to 64
28.9%
Over 65
23.5%
Value Percent YoY change
Under 15 6,238 14.3% -2.1%
15 to 24 4,382 10% 2.0%
25 to 44 10,178 23.3% 3.1%
45 to 64 12,629 28.9% -2.3%
Over 65 10,288 23.5% 2.2%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Sullivan County, 97.1% of the population are US-born citizens, while 2.4% have gained naturalized citizenship. At the same time, 0.5% of residents are non-citizens. As for race, 92.1% of locals are Caucasian, 0.8% are African American and 0.3% have Asian roots. There’s also a share of 5.6% that includes residents with two or more races.

Citizenship
U.S.-born citizens
97.1%
Non-U.S.-born citizens
2.4%
Non-citizens
0.5%
Value Percent YoY change
U.S.-born citizens 42,439 97.1% 0.2%
Non-U.S.-born citizens 1,055 2.4% 12.6%
Non-citizens 221 0.5% -10.9%
Racial breakdown
White
92.1%
Black or African American
0.8%
American Indian and Alaska Native
0%
Asian
0.3%
Native Hawaiian and other Pacific Islander
0%
Two or more races
5.6%
Other
1.2%
Value Percent
White 40,275 92.1%
Black or African American 339 0.8%
American Indian and Alaska Native 21 0%
Asian 125 0.3%
Native Hawaiian and other Pacific Islander 8 0%
Two or more races 2,440 5.6%
Other 507 1.2%

Households in Sullivan County

A peek inside Sullivan County households

Sullivan County has 16,618 households, with an average of 3 members in each. Of these, 61.3% are families, while the remaining 38.7% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
16,618
3.4% year-over-year change
Average people per household
3
Non-family households
6,434
Family households
10,184
Value Percent YoY change
Non-family households 6,434 38.7% 6.4%
Family households 10,184 61.3% 1.5%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Sullivan County

The housing landscape of Sullivan County

Sullivan County's housing consists of 21,958 units, with 73.9% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 1.9% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 7.7% of the housing landscape.

Housing units
21,958
0.2% year-over-year change
Housing types
Value Percent
1 unit, detached 16,230 73.9%
1 unit, attached 409 1.9%
2 units 675 3.1%
3 or 4 units 897 4.1%
5 to 9 units 843 3.8%
10 to 19 units 506 2.3%
20 to 49 units 315 1.4%
50 or more units 384 1.8%
Mobile home 1,699 7.7%
Homes built since 2020
202
274.1% year-over-year change

The age of buildings in Sullivan County

In Sullivan County, the median construction year is 1974. About 23.7% of homes were built before the 1940s, with another 4.5% going up by 1949. Most development happened in the second half of the 20th century. Then, 9.5% of homes were added from 2000 to 2009, 3.8% between 2010 and 2019, and 0.9% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 5,198 23.7% -2.7%
Built between 1940 and 1949 987 4.5% 6.2%
Built between 1950 and 1959 1,752 8% 7.6%
Built between 1960 and 1969 1,505 6.8% -8.3%
Built between 1970 and 1979 3,882 17.7% 1.3%
Built between 1980 and 1989 3,520 16% -7.8%
Built between 1990 and 1999 1,980 9% -7.0%
Built between 2000 and 2009 2,089 9.5% 19.9%
Built between 2010 and 2019 843 3.8% 7.1%
Built in 2020 or later 202 0.9% 274.1%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Sullivan County occupancy rates

Out of the 16,618 occupied housing units in Sullivan County, 75.4% are owner-occupied, while 24.6% are lived in by tenants. Meanwhile, 24.3% of all homes on the local market sit vacant.

Occupied housing units
16,618
3.4% year-over-year change
Occupancy breakdown
Renter occupied
4,087
Owner occupied
12,531
Value Percent YoY
change
Renter occupied 4,087 24.6% 1.0%
Owner occupied 12,531 75.4% 4.2%
Unoccupied housing units
24.3%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Sullivan County housing costs

Housing costs in Sullivan County come to a median of $1,295 per month, while tenants specifically pay a median gross rent of $1,211.

Median housing costs per month
$1,295/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Sullivan County
$1,211/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Sullivan County

Sullivan County education at a glance

About 42.4% of the population in Sullivan County went to high school, while 17.3% pursued college studies. Another 9.2% earned an associate degree and 17.8% hold a bachelor’s. Meanwhile, 10.6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 984 2.7% 8.7%
High school diploma 15,247 42.4% -3.1%
College diploma 6,222 17.3% 13.5%
Associate degree 3,298 9.2% -2.1%
Bachelor's degree 6,394 17.8% -0.4%
Graduate degree 3,813 10.6% 1.1%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Sullivan County

How much people earn in Sullivan County

The average annual household income in Sullivan County was $105,975 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +3.9% change from the previous year. At the same time, the median income stood at $80,858, reflecting a +6.5% shift over the same period.

Average household income in Sullivan County
$105,975/year
3.9% year-over-year change
Median household income in Sullivan County
$80,858/year
6.5% year-over-year change

Sullivan County income by age

In Sullivan County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $97,072. Those with someone between 45 and 64 in charge, often well established professionally, earn $96,326 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $64,167, while those led by someone over 65, many of whom may be retired, have about $53,184 in earnings. Overall, 90% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $64,167 -27.8%
25 - 44 $97,072 6.7%
45 - 64 $96,326 5.4%
Over 65 $53,184 8.0%
Above poverty level
38,349
Below poverty level
4,265
Value Percent YoY
change
Above poverty level 38,349 90% 1.0%
Below poverty level 4,265 10% -6.3%

Employment in Sullivan County

Workforce and job types in Sullivan County

The job market in Sullivan County is powered by 21,462 working residents, spread across a range of industries and roles. 73.2% of the working population are employed in professional or administrative positions, while 26.8% are in hands-on or service-based jobs. Also, 10.5% run their own businesses, 61.8% are employed by private companies, and 10.3% work in the public sector.

Workforce demographics

Working population
21,462
2.8% year-over-year change
White collar
15,700
Blue collar
5,762
Value Percent YoY change
White collar 15,700 73.2% 3.4%
Blue collar 5,762 26.8% 1.3%
Employer type
Self employees
10.5%
Private companies
61.8%
Governmental workers
10.3%
Not for profit companies
17.4%
Value Percent YoY change
Self employees 2,256 10.5% 13.9%
Private companies 13,267 61.8% 1.5%
Governmental workers 2,209 10.3% 4.2%
Not for profit companies 3,730 17.4% 0.6%
Unemployment rate
3.1%
39.8% year-over-year change

Available workforce

The unemployment rate in Sullivan County stands at 3.1%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Sullivan County

How people get around in Sullivan County

Commuting methods vary: 85.5% of residents travel by personal vehicle and 2.3% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 18,016 85.5% 2.3%
Taxicab 106 0.5% 96.3%
Bus or trolleybus 18 0.1% 50.0%
Bicycle 6 0% -14.3%
Walk 492 2.3% -0.8%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Sullivan County by zipcode?

Zipcode Population Number of households Median income Average income
03280 1,224 489 $90,096 $118,938
03284 890 278 $113,158 $118,992
03601 382 102 $81,250 $71,402
03602 2,381 1,024 $70,455 $119,345
03603 5,238 1,726 $56,731 $85,020
03605 907 327 $86,250 $95,006
03607 368 129 $84,306 $109,225
03743 13,704 5,245 $59,625 $82,149
03745 1,816 766 $91,821 $111,503

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FAQs about Sullivan County demographics 

What is the total population of Sullivan County?

Sullivan County has a total population of 43,715 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.4% compared to a year ago.

What is the gender ratio in Sullivan County?

The gender ratio in Sullivan County is as follows:
  • 50.4% males (22,035 residents)
  • 49.6% females (21,680 residents)

What is the median age in Sullivan County?

The median age in Sullivan County is 47.

What is the age distribution of the population in Sullivan County?

The age distribution in Sullivan County is as follows:
  • Under 15: 14.3% (6,238 residents)
  • Ages 15-24: 10% (4,382 residents)
  • Ages 25-44: 23.3% (10,178 residents)
  • Ages 45-64: 28.9% (12,629 residents)
  • Over 65: 23.5% (10,288 residents)

What is the racial and ethnic makeup of Sullivan County?

The racial and ethnic makeup of Sullivan County is as follows:
  • White: 92.1% (40,275 residents)
  • Black or African American: 0.8% (339 residents)
  • American Indian and Alaska Native: 0% (21 residents)
  • Asian: 0.3% (125 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (8 residents)
  • Two or More Races: 5.6% (2,440 residents)
  • Other: 1.2% (507 residents)

What percentage of the population in Sullivan County are U.S.-born citizens?

U.S.-born citizens represent 97.1% of the population in Sullivan County.

How many housing units are there in Sullivan County?

There are 21,958 housing units in Sullivan County, reflecting a +0.2% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Sullivan County and what is the average household size?

Sullivan County has a total of 16,618 households, with an average of 3 people in each.

What is the median household income in Sullivan County?

Sullivan County has a median household income of $80,858, representing a +6.5% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Sullivan County?

The employment rate is 96.9% in Sullivan County, with a workforce of 21,462 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 73.2% (15,700 residents)
  • Blue-collar workers: 26.8% (5,762 residents)

Places of employment:
  • Self-employed: 10.5% (2,256 residents)
  • Private companies: 61.8% (13,267 residents)
  • Governmental workers: 10.3% (2,209 residents)
  • Not-for-profit companies: 17.4% (3,730 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025