Idaho

Canyon

231,105
2020 population
1900
first census record
13
census records

About Canyon

Canyon, Idaho, first appears in the United States federal census in 1900, when it recorded a population of 7,497. At the most recent census, in 2020, its population stood at 231,105.

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 Fort Boise Area Engagements 1862–1863, and 45 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020231,105
2010188,923
2000131,441
199090,076
198083,756
197061,288
196057,662
195053,597
194040,987
193030,930
192026,932
191025,323
19007,497
Source

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

Battles & engagements in Canyon

Military engagements that took place in Canyon, Idaho.

Fort Boise Area Engagements 1862–1863
1862

Historic places in Canyon

National Register of Historic Places listings in Canyon, Idaho.

Caldwell Odd Fellow Home for the Aged
Caldwell
Caldwell Historic District
Caldwell
Nampa Depot
Nampa
US Post Office-Nampa Main
Nampa
Rice, John C., House
Caldwell
Wiley, Orton H., House
Nampa
Farmers and Merchants Bank
Nampa
St. Mary's Catholic Church
Caldwell
Steunenberg, A. K., House
Caldwell
Obendorf, George, Gothic Arch Truss Barn
Wilder
Dewey, E. H., Stores
Nampa
Sterry Hall
Caldwell
Boise River and Canal Bridge
Caldwell
US Post Office-Caldwell Main
Caldwell
Nampa Department Store
Nampa
Fort Boise and Riverside Ferry Sites
Parma
Nampa Historic District
Nampa
Blatchley Hall
Caldwell
Middleton Substation
Middleton
Little, Thomas K., House
Caldwell
Nampa Presbyterian Church
Nampa
North Caldwell Historic District
Caldwell
Map Rock Petroglyphs Historic District
Givens Springs
Dorman, Henry W. and Ida Frost, House
Caldwell
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Other counties in Idaho

Explore census history and historic records for more Idaho counties.

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Everything a full report reveals about Canyon County, Idaho

This page charts the census history of Canyon County, Idaho. 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 Canyon

When does Canyon first appear in the US census?
Canyon, Idaho first appears in the federal census in 1900, with a recorded population of 7,497.
What is the population of Canyon?
At the most recent federal census (2020), Canyon had a recorded population of 231,105.
Were any battles fought in Canyon?
1 documented military engagement took place in Canyon, including Fort Boise Area Engagements 1862–1863.
How many historic places are in Canyon?
45 sites are listed on the National Register of Historic Places in Canyon, Idaho.
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