Coos County, New Hampshire Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 10th-largest in New Hampshire
The population of Coos County, New Hampshire is 31,386 as of the 2023 American Community Survey, making it the 10th-largest county in New Hampshire. The median household income is $58,439, the median home value is $169,600, and the median age is 49.9.
The population of Coos County has declined 5.7% since 2010 (32,970 → 31,094), a -0.42% annualized rate.
31,386
Population
-0.42%
Annual growth
17
People / sq mi
$58,439
Median Income
$169,600
Median Home Value
Coos County covers 1,795 sq mi of land at 17.5 people per square mile.
About Coos County, NH
Coos County is a county in New Hampshire with a population of 31,386. It ranks #10 among counties in New Hampshire by population. The median age is 49.9, older than the national median. The population is 52.9% male and 47.1% female.
The median household income in Coos County is $58,439, below the US median of $74,580. 8.7% of residents live below the federal poverty level. Home values sit at a median of $169,600, with monthly rent averaging $843. The homeownership rate of 74.0% is higher than the national rate of 64.8%.
Educational attainment in Coos County reflects 20.2% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 8.2% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 22.8 minutes each way.
Coos County Population History (2010-2024)
The county of Coos County had a population of 32,970 in 2010 and 31,094 in 2024, a -5.7% growth over 14 years. The peak was 32,970 in 2010. Average annual growth rate: -0.41%.
31,094
Population (2024)
32,970
Population (2010)
32,970
Peak (2010)
-0.41%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 32,970 |
| 2011 | 32,512 |
| 2012 | 31,980 |
| 2013 | 31,952 |
| 2014 | 32,787 |
| 2015 | 32,351 |
| 2016 | 31,923 |
| 2017 | 31,418 |
| 2018 | 31,490 |
| 2019 | 31,421 |
| 2020 | 31,228 |
| 2021 | 31,387 |
| 2022 | 31,430 |
| 2023 | 31,209 |
| 2024 | 31,094 |
Race & Ethnicity
| White | 94.3% |
| Black or African American | 1.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.3% |
| Two or More Races | 0.0% |
Age & Sex
49.9
Median Age
47.1%
Female
52.9%
Male
25.2%
Age 65+
Age Distribution
Children (under 15): 12.9% · Seniors (65+): 25.2%
Income & Poverty
| Median household income | $58,439$-37,189 vs state |
| Mean household income | $82,759 |
| Per-capita income | $36,850 |
| Poverty rate | 8.7%+4.3% vs state |
| Unemployment rate | 2.3% |
| Employment-to-population | 52.4% |
Top Industries by Employment
The largest employment sector in Coos County is professional & business services, accounting for 24.3% of workers.
How residents commute
0.1%
Drive alone
2.7%
Carpool
76.7%
Public transit
8.2%
Work from home
22.8 min
Avg commute
Housing
$169,600$-197,600 vs state
Median home value
$843
Median rent
74.0%
Homeownership rate
20,589
Total housing units
67.1%
Occupied
32.9%
Vacant
26.0%
Renter-occupied
Social & access
93.0%
With health insurance
92.3%
With broadband internet
40.9%
Foreign-born
10.2%
Veterans (18+)
21.0%
With a disability
92.1%
Speak language other than English at home
Education
89.5%
High School+
20.2%
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
Coos County, New Hampshire has a population of 31,386 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 10th-largest county in New Hampshire. Population density is 17 people per square mile.
The population of Coos County has declined 5.7% since 2010 (32,970 → 31,094), a -0.42% annualized rate.
The median household income in Coos County, New Hampshire is $58,439, with mean (average) household income of $82,759 and per-capita income of $36,850. 8.7% of residents live below the federal poverty level.
In Coos County, the largest racial and ethnic groups are White (94.3%), Black or African American (1.7%), Hispanic or Latino (1.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Coos County, New Hampshire is 49.9 years. Residents are 47.1% female and 52.9% male.
The median home value in Coos County is $169,600 and median monthly rent is $843. 74.0% of occupied housing units are owner-occupied. The county has 20,589 total housing units, 32.9% of which are vacant.
The largest employment sector in Coos County, New Hampshire is professional, scientific, and management services, employing 24.3% of workers. The unemployment rate is 2.3%.
Manchester is among the largest cities associated with Coos 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.