Idaho

Lemhi

7,974
2020 population
1870
first census record
16
census records

About Lemhi

Lemhi, Idaho, first appears in the United States federal census in 1870, when it recorded a population of 988. At the most recent census, in 2020, its population stood at 7,974.

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

On the ground today, 7 documented military engagements have been recorded within the county, among them Skirmish at Birch Creek, Nez Perce War — Battle of Camas Creek 1877, Battle of Camas Meadows — Bannock War, and 15 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
20207,974
20107,936
20007,806
19906,899
19807,460
19705,566
19605,816
19506,278
19406,521
19304,643
19205,164
19104,786
19003,446
18901,915
18802,230
1870988
Source

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

Battles & engagements in Lemhi

Military engagements that took place in Lemhi, Idaho.

Skirmish at Birch Creek
1877
Nez Perce War — Battle of Camas Creek 1877
1877
Battle of Camas Meadows — Bannock War
1878
Battle of Birch Creek ID
1878
Battle of Birch Creek (Idaho)
1878
Sheepeater War Idaho
1879
Salmon River Country Outlaw Raids, Lemhi County ID
1879

Historic places in Lemhi

National Register of Historic Places listings in Lemhi, Idaho.

Fort Lemhi
Salmon
Lemhi Boarding School Girls Dormitory
Lemhi
First Flag Unfurling Site, Lewis and Clark Trail
Tendoy
Geertson, Lars, House
Salmon
Shoup Rock Shelters
Cobalt
Myers, Socrates A., House
Salmon
Odd Fellows Hall
Salmon
Lemhi County Courthouse
Salmon
Episcopal Church of the Redeemer
Salmon
Lemhi Pass
Tendoy
Charcoal Kilns
Leadore
Shoup Building
Salmon
Salmon Odd Fellows Hall
Salmon
Salmon City Hall and Library
Salmon
Leesburg
Salmon

Other counties in Idaho

Explore census history and historic records for more Idaho counties.

ClarkClearwaterCusterElmoreFranklinFremontGemGoodingIdahoJeffersonJeromeKootenaiLatahLewisLincolnLoganMadisonMinidokaNez PerceOneida
Unlimited access

Everything a full report reveals about Lemhi County, Idaho

This page charts the census history of Lemhi 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.
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 Lemhi County, Idaho report
Or see a real report first

Explore Idaho records

Idahohistory ›NRHP historic sites ›Notable people from Idaho›

Frequently asked about Lemhi

When does Lemhi first appear in the US census?
Lemhi, Idaho first appears in the federal census in 1870, with a recorded population of 988.
What is the population of Lemhi?
At the most recent federal census (2020), Lemhi had a recorded population of 7,974.
Were any battles fought in Lemhi?
7 documented military engagements took place in Lemhi, including Skirmish at Birch Creek, Nez Perce War — Battle of Camas Creek 1877, Battle of Camas Meadows — Bannock War.
How many historic places are in Lemhi?
15 sites are listed on the National Register of Historic Places in Lemhi, Idaho.
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