Colorado

Larimer

359,066

2020 population

1870

first census record

census records

About Larimer

Larimer, Colorado, first appears in the United States federal census in 1870, when it recorded a population of 838. At the most recent census, in 2020, its population stood at 359,066.

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

On the ground today, 113 places are listed on the National Register of Historic Places.

Population by decade

Census Year	Population	Chart
2020	359,066
2010	299,630
2000	251,494
1990	186,136
1980	149,184
1970	89,900
1960	53,343
1950	43,554
1940	35,539
1930	33,137
1920	27,872
1910	25,270
1900	12,168
1890	9,712
1880	4,892
1870	838

Source

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

Historic places in Larimer

National Register of Historic Places listings in Larimer, Colorado.

Bear Lake Comfort Station

Estes Park

Willard, Beatrice, Alpine Tundra Research Plots

Estes Park

Fort Collins Municipal Railway Birney Safety Streetcar No. 21

Fort Collins

White, William Allen, Cabins

Pleasant Valley School

Bellvue

Snogo Snow Plow

Estes Park

Shaffer, Henry K. and Mary E., House

Loveland

Baldpate Inn

Estes Park

Rocky Mountain National Park Utility Area Historic District

Estes Park

Leiffer House

Estes Park

Borland, Maude Stanfield Harter, House

Loveland

Fall River Pump House and Catchment Basin

Estes Park

Fuller, Montezuma, House

Fort Collins

Willow Park Patrol Cabin

Estes Park

Botanical and Horticultural Laboratory

Fort Collins

Fall River Pass Ranger Station

Estes Park

Moraine Park Museum and Amphitheater

Estes Park

Browse all Coloradohistoric sites ›

Other counties in Colorado

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Everything a full report reveals about Larimer County, Colorado

This page charts the census history of Larimer County, Colorado. 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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Coloradohistory ›NRHP historic sites ›Notable people from Colorado›

Frequently asked about Larimer

When does Larimer first appear in the US census?

Larimer, Colorado first appears in the federal census in 1870, with a recorded population of 838.

What is the population of Larimer?

At the most recent federal census (2020), Larimer had a recorded population of 359,066.

How many historic places are in Larimer?

113 sites are listed on the National Register of Historic Places in Larimer, Colorado.

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