New Hampshire

Merrimack

153,808
2020 population
1830
first census record
20
census records

About Merrimack

Merrimack, New Hampshire, first appears in the United States federal census in 1830, when it recorded a population of 34,614. At the most recent census, in 2020, its population stood at 153,808.

The county's recorded population has risen across the decades to its highest level in 2020.

On the ground today, one documented military engagement has been recorded within the county, among them Stark's March to Bennington, and 89 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020153,808
2010146,445
2000136,225
1990120,005
198098,302
197080,925
196067,785
195063,022
194060,710
193056,152
192051,770
191053,335
190052,430
189049,435
188046,300
187042,151
186041,408
185040,337
184036,253
183034,614
Source

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

Battles & engagements in Merrimack

Military engagements that took place in Merrimack, New Hampshire.

Stark's March to Bennington
1777

Historic places in Merrimack

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

2 1/2 Beacon Street
Concord
Harvey, Matthew, House
Sutton
Millville School
Concord
Whipple, Dr. Solomon M., House
New London
Stanley Tavern
Hopkinton
Noyes, Jacob, Block
Suncook
South Sutton Meeting House
South Sutton
Beaver Meadow Brook Archeological Site (27MR3)
Concord
Boscawen Academy and Much-I-Do-Hose House
Boscawen
East Andover Village Center Historic District
Andover
Long, William H., Memorial
Hopkinton
New Hampshire Savings Bank Building
Concord
Memorial Arch of Tilton
Northfield
Keniston Bridge
Andover
Lower Warner Meetinghouse
Lower Warner
Concord Historic District
Concord
Pineground Bridge
Chichester
Bridges, H. Styles, House
Concord
Dalton Covered Bridge
Warner
Old Webster Meeting House
Webster
Loudon Town Hall
Loudon
Pillsbury Memorial Hall
Sutton
Blossom Hill and Calvary Cemeteries
Concord
Allenstown Meeting House
Allenstown
Browse all New Hampshirehistoric sites ›

Other counties in New Hampshire

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

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Everything a full report reveals about Merrimack County, New Hampshire

This page charts the census history of Merrimack 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 Merrimack

When does Merrimack first appear in the US census?
Merrimack, New Hampshire first appears in the federal census in 1830, with a recorded population of 34,614.
What is the population of Merrimack?
At the most recent federal census (2020), Merrimack had a recorded population of 153,808.
Were any battles fought in Merrimack?
1 documented military engagement took place in Merrimack, including Stark's March to Bennington.
How many historic places are in Merrimack?
89 sites are listed on the National Register of Historic Places in Merrimack, New Hampshire.
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