Idaho

Gem

19,123
2020 population
1920
first census record
11
census records

About Gem

Gem, Idaho, first appears in the United States federal census in 1920, when it recorded a population of 6,427. At the most recent census, in 2020, its population stood at 19,123.

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 Massacre at Ward Farm, and 10 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202019,123
201016,719
200015,181
199011,844
198011,972
19709,387
19609,127
19508,730
19409,544
19307,419
19206,427
Source

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

Battles & engagements in Gem

Military engagements that took place in Gem, Idaho.

Massacre at Ward Farm
1854

Historic places in Gem

National Register of Historic Places listings in Gem, Idaho.

Gem County Courthouse
Emmett
Sweet Methodist Episcopal Church
Sweet
Catholic Church of the Sacred Heart
Emmett
First Baptist Church of Emmett
Emmett
Emmett Presbyterian Church
Emmett
St. Mary's Episcopal Church
Emmett
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 Gem County, Idaho

This page charts the census history of Gem 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 Gem

When does Gem first appear in the US census?
Gem, Idaho first appears in the federal census in 1920, with a recorded population of 6,427.
What is the population of Gem?
At the most recent federal census (2020), Gem had a recorded population of 19,123.
Were any battles fought in Gem?
1 documented military engagement took place in Gem, including Massacre at Ward Farm.
How many historic places are in Gem?
10 sites are listed on the National Register of Historic Places in Gem, Idaho.
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