Colorado

San Juan

705
2020 population
1880
first census record
15
census records

About San Juan

San Juan, Colorado, first appears in the United States federal census in 1880, when it recorded a population of 1,087. At the most recent census, in 2020, its population stood at 705.

Its recorded population peaked at 3,063 in 1910, and has since declined by roughly 77 percent.

On the ground today, 11 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020705
2010699
2000558
1990745
1980833
1970831
1960849
19501,471
19401,439
19301,935
19201,700
19103,063
19002,342
18901,572
18801,087
Source

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

Historic places in San Juan

National Register of Historic Places listings in San Juan, Colorado.

Animas Forks
Silverton
Shenandoah-Dives Mill
Silverton
Cascade Boy Scout Camp
Durango
Browse all Coloradohistoric sites ›

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Explore census history and historic records for more Colorado counties.

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Everything a full report reveals about San Juan County, Colorado

This page charts the census history of San Juan 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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Frequently asked about San Juan

When does San Juan first appear in the US census?
San Juan, Colorado first appears in the federal census in 1880, with a recorded population of 1,087.
What is the population of San Juan?
At the most recent federal census (2020), San Juan had a recorded population of 705.
When did San Juan's population peak?
San Juan's recorded population peaked at 3,063 in 1910.
How many historic places are in San Juan?
11 sites are listed on the National Register of Historic Places in San Juan, Colorado.
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