New Hampshire

Coos

31,268
2020 population
1810
first census record
22
census records

About Coos

Coos, New Hampshire, first appears in the United States federal census in 1810, when it recorded a population of 3,991. At the most recent census, in 2020, its population stood at 31,268.

Its recorded population peaked at 39,274 in 1940, and has since declined by roughly 20 percent.

On the ground today, 33 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202031,268
201033,055
200033,111
199034,828
198035,147
197034,291
196037,140
195035,932
194039,274
193038,959
192036,093
191030,753
190029,468
189023,211
188018,580
187014,932
186013,161
185011,853
18409,849
18308,388
18205,549
18103,991
Source

Population data from the United States decennial census, U.S. Census Bureau (public domain).

Historic places in Coos

National Register of Historic Places listings in Coos, New Hampshire.

Saint Anne Historic District
Berlin
Mt. Jasper Lithic Source
Berlin
US Post Office-Lancaster Main
Lancaster
Crawford Depot
Carroll
Holy Resurrection Orthodox Church
Berlin
Wallace Farm
Columbia
Weeks, William Dennis, Memorial Library
Lancaster
Mount Washington Hotel
Bretton Woods
Martin Homestead
North Stratford
Balsams, The
Dixville
St. Anne Church
Berlin
Meadow Bridge
Shelburne
Stark Covered Bridge
Groveton
Mountain View House
Whitefield
Waumbek Cottages Historic District
Jefferson
Tip-Top House
Sargent's Purchase
Weeks Estate
Lancaster
Noyes, George Washington, House
Gorham
Burgess, George E., School-Notre Dame High School
Berlin
Wilder-Holton House
Lancaster
Columbia Covered Bridge
Columbia
Congregational Church
Berlin
Philbrook Farm Inn
Shelburne
Crawford House Artist's Studio
Carroll
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Other counties in New Hampshire

Explore census history and historic records for more New Hampshire counties.

HillsboroughMerrimackRockinghamStraffordSullivanBelknapCarrollCheshireGrafton
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Everything a full report reveals about Coos County, New Hampshire

This page charts the census history of Coos County, New Hampshire. A full Aubrey report for an address here pulls together everything the historical record holds about the ground, from the earliest settlement to the twentieth century:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
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Frequently asked about Coos

When does Coos first appear in the US census?
Coos, New Hampshire first appears in the federal census in 1810, with a recorded population of 3,991.
What is the population of Coos?
At the most recent federal census (2020), Coos had a recorded population of 31,268.
When did Coos's population peak?
Coos's recorded population peaked at 39,274 in 1940.
How many historic places are in Coos?
33 sites are listed on the National Register of Historic Places in Coos, New Hampshire.
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