Idaho

Twin Falls

90,046
2020 population
1910
first census record
12
census records

About Twin Falls

Twin Falls, Idaho, first appears in the United States federal census in 1910, when it recorded a population of 13,543. At the most recent census, in 2020, its population stood at 90,046.

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 Salmon Falls Massacre, Battle of Bennett Creek, and 40 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202090,046
201077,230
200064,284
199053,580
198052,927
197041,807
196041,842
195040,979
194036,403
193029,828
192028,398
191013,543
Source

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

Battles & engagements in Twin Falls

Military engagements that took place in Twin Falls, Idaho.

Salmon Falls Massacre
1862
Battle of Bennett Creek
1878

Historic places in Twin Falls

National Register of Historic Places listings in Twin Falls, Idaho.

Milner Dam and the Twin Falls Main Canal
Murtaugh
Buhl IOOF Building
Buhl
Hollister School
Hollister
Kimberly High School
Kimberly
Ramona Theater
Buhl
Stricker Store and Farm
Twin Falls
Buhl City Hall
Buhl
Twin Falls Original Townsite Residential Historic District
Twin Falls
Alvis, James, House
Twin Falls
Twin Falls Downtown Historic District
Twin Falls
Salmon Falls Dam
Rogerson
Morse, Burton, House
Twin Falls
Browse all Idahohistoric sites ›

Other counties in Idaho

Explore census history and historic records for more Idaho counties.

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Everything a full report reveals about Twin Falls County, Idaho

This page charts the census history of Twin Falls 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 Twin Falls

When does Twin Falls first appear in the US census?
Twin Falls, Idaho first appears in the federal census in 1910, with a recorded population of 13,543.
What is the population of Twin Falls?
At the most recent federal census (2020), Twin Falls had a recorded population of 90,046.
Were any battles fought in Twin Falls?
2 documented military engagements took place in Twin Falls, including Salmon Falls Massacre, Battle of Bennett Creek.
How many historic places are in Twin Falls?
40 sites are listed on the National Register of Historic Places in Twin Falls, Idaho.
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