Connecticut

New Haven

864,835
2020 population
1790
first census record
24
census records

About New Haven

New Haven, Connecticut, first appears in the United States federal census in 1790, when it recorded a population of 30,830. At the most recent census, in 2020, its population stood at 864,835.

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

On the ground today, 2 documented military engagements have been recorded within the county, among them Burning of New Haven, Raid on New Haven (Connecticut), and 277 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020864,835
2010862,477
2000824,008
1990804,219
1980761,337
1970744,948
1960660,315
1950545,784
1940484,316
1930463,449
1920415,214
1910337,282
1900269,163
1890209,058
1880156,523
1870121,257
186097,345
185065,588
184048,582
183043,847
182039,616
181037,064
180032,162
179030,830
Source

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

Battles & engagements in New Haven

Military engagements that took place in New Haven, Connecticut.

Burning of New Haven
1779
Raid on New Haven (Connecticut)
1779

Historic places in New Haven

National Register of Historic Places listings in New Haven, Connecticut.

Johnson, Franklin, House
Wallingford
Lincoln Theatre
New Haven
Birmingham Green Historic District
Derby
New Haven Green Historic District
New Haven
Crawford, George W., Manor
New Haven
Blakeslee, Joseph, House
Wallingford
Fort Nathan Hale
New Haven
South Britain Historic District
Southbury
Howard Avenue Historic District
New Haven
Sterling Opera House
Derby
Ansonia Library
Ansonia
Fourth District School
North Branford
Eliot, Jared, House
Guilford
Grove Street Cemetery
New Haven
Frisbie, Edward, Homestead
Branford
State Park Supply Yard
Madison
Osbornedale
Derby
Woodbridge Green Historic District
Woodbridge
Tranquility Farm
Middlebury
Whitfield, Henry, House
Guilford
Whitfield, Henry, House
Guilford
Overlook Historic District
Waterbury
Orange Center Historic District
Orange
Hall-Benedict Drug Company Building
New Haven
Browse all Connecticuthistoric sites ›

Other counties in Connecticut

Explore census history and historic records for more Connecticut counties.

MiddlesexNew LondonTollandWindhamFairfieldHartfordLitchfield
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Everything a full report reveals about New Haven County, Connecticut

This page charts the census history of New Haven County, Connecticut. 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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Connecticuthistory ›NRHP historic sites ›Notable people from Connecticut›

Frequently asked about New Haven

When does New Haven first appear in the US census?
New Haven, Connecticut first appears in the federal census in 1790, with a recorded population of 30,830.
What is the population of New Haven?
At the most recent federal census (2020), New Haven had a recorded population of 864,835.
Were any battles fought in New Haven?
2 documented military engagements took place in New Haven, including Burning of New Haven, Raid on New Haven (Connecticut).
How many historic places are in New Haven?
277 sites are listed on the National Register of Historic Places in New Haven, Connecticut.
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