New York

Onondaga

476,516
2020 population
1800
first census record
23
census records

About Onondaga

Onondaga, New York, first appears in the United States federal census in 1800, when it recorded a population of 7,698. At the most recent census, in 2020, its population stood at 476,516.

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

On the ground today, 8 documented military engagements have been recorded within the county, among them Onondaga County Palisaded Villages – Pre-Contact, Onondaga Iroquois Internecine Warfare – Quirk Site, Iroquois League Formation Wars – Onondaga, and 183 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020476,516
2010467,026
2000458,336
1990468,973
1980463,920
1970472,746
1960423,028
1950341,719
1940295,108
1930291,606
1920241,465
1910200,298
1900168,735
1890146,247
1880117,893
1870104,183
186090,686
185085,890
184067,911
183058,973
182041,467
181025,987
18007,698
Source

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

Battles & engagements in Onondaga

Military engagements that took place in Onondaga, New York.

Onondaga County Palisaded Villages – Pre-Contact
1400
Onondaga Iroquois Internecine Warfare – Quirk Site
1400
Iroquois League Formation Wars – Onondaga
1450
Iroquois Confederacy Formation Wars
1500
Battle of the Flockey
1777
Destruction of Onondaga
1779
Sullivan-Clinton Expedition – Burning of Onondaga Towns 1779
1779
Destruction of Onondaga (1779)
1779

Historic places in Onondaga

National Register of Historic Places listings in Onondaga, New York.

Garrett House
Syracuse
Skoler, Louis and Celia, Residence, The
Syracuse
Armory Square Historic District
Syracuse
Kelly House
Syracuse
Stickley, Gustav, House
Syracuse
Church of the Good Shepherd
Syracuse
Gere Bank Building
Syracuse
North Salina Street Historic District
Syracuse
Niagara Hudson Building, The
Syracuse
Leavenworth Apartments
Syracuse
South Salina Street Downtown Historic District
Syracuse
First English Lutheran Church
Syracuse
Sanderson House-301 Scottholm Blvd.
Syracuse
Solvay Public Library
Solvay
Camillus Union Free School
Camillus
Hotel Syracuse
Syracuse
Will, Louis, House
Syracuse
Gleason, Lucius, House
Liverpool
Wilcox Octagon House
Camillus
Ziegler House
Syracuse
Central New York Telephone and Telegraph Building
Syracuse
Onondaga Park
Syracuse
White, Hamilton, House
Syracuse
Brown, Alexander, House
Syracuse
Browse all New Yorkhistoric sites ›

Other counties in New York

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

OtsegoPutnamQueensRensselaerRichmondRocklandSaratogaSchenectadySchoharieSchuylerSenecaSt. LawrenceSteubenSuffolkSullivanTiogaTompkinsUlsterWarrenWashington
Unlimited access

Everything a full report reveals about Onondaga County, New York

This page charts the census history of Onondaga County, New York. 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.
First month just $5.99, then $11.99 a month. Unlimited locations, cancel anytime.

Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.

Start your Onondaga County, New York report
Or see a real report first

Explore New York records

New Yorkhistory ›NRHP historic sites ›Notable people from New York›

Frequently asked about Onondaga

When does Onondaga first appear in the US census?
Onondaga, New York first appears in the federal census in 1800, with a recorded population of 7,698.
What is the population of Onondaga?
At the most recent federal census (2020), Onondaga had a recorded population of 476,516.
Were any battles fought in Onondaga?
8 documented military engagements took place in Onondaga, including Onondaga County Palisaded Villages – Pre-Contact, Onondaga Iroquois Internecine Warfare – Quirk Site, Iroquois League Formation Wars – Onondaga.
How many historic places are in Onondaga?
183 sites are listed on the National Register of Historic Places in Onondaga, New York.
Aubrey Research

Research the history of any US location

Aubrey searches federal archives, archaeological records, historic registers, and primary sources to build a full historical report for any address or place in the United States.

Research your locationView a free sample report