Idaho

Blaine

24,272
2020 population
1900
first census record
13
census records

About Blaine

Blaine, Idaho, first appears in the United States federal census in 1900, when it recorded a population of 4,900. At the most recent census, in 2020, its population stood at 24,272.

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 Bannock War — Battle of Willow Springs, and 23 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202024,272
201021,376
200018,991
199013,552
19809,841
19705,749
19604,598
19505,384
19405,295
19303,768
19204,473
19108,387
19004,900
Source

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

Battles & engagements in Blaine

Military engagements that took place in Blaine, Idaho.

Bannock War — Battle of Willow Springs
1878

Historic places in Blaine

National Register of Historic Places listings in Blaine, Idaho.

Gimlet Pegram Truss Railroad Bridge
Ketchum
Sawtooth City
Sun Valley
Fish Creek Dam
Carey
Werthheimer Building
Hailey
Fox, J. C., Building
Hailey
Miller, Henry, House
Bellevue
Hailey Masonic Lodge
Hailey
St. Charles of the Valley Catholic Church and Rectory
Hailey
Pound, Homer, House
Hailey
Blaine County Courthouse
Hailey
Ketchum Ranger District Administrative Site
Ketchum
Hailey Methodist Episcopal Church
Hailey
Chase, Eben S. and Elizabeth S., House
Hailey
Fox-Worswick House
Hailey
Bald Mountain Hot Springs
Ketchum
Cold Springs Pegram Truss Railroad Bridge
Ketchum
Hemingway, Ernest and Mary, House
Ketchum
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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 Blaine County, Idaho

This page charts the census history of Blaine 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 Blaine

When does Blaine first appear in the US census?
Blaine, Idaho first appears in the federal census in 1900, with a recorded population of 4,900.
What is the population of Blaine?
At the most recent federal census (2020), Blaine had a recorded population of 24,272.
Were any battles fought in Blaine?
1 documented military engagement took place in Blaine, including Bannock War — Battle of Willow Springs.
How many historic places are in Blaine?
23 sites are listed on the National Register of Historic Places in Blaine, Idaho.
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