Colorado

Denver

715,522
2020 population
1910
first census record
12
census records

About Denver

Denver, Colorado, first appears in the United States federal census in 1910, when it recorded a population of 213,381. At the most recent census, in 2020, its population stood at 715,522.

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

On the ground today, 4 documented military engagements have been recorded within the county, among them First Denver Vigilante Hanging — John Stoefel, Denver City Massacres, Battle of Cherry Creek (Cheyenne Raid 1865), and 324 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020715,522
2010600,158
2000554,636
1990467,610
1980492,365
1970514,678
1960493,887
1950415,786
1940322,412
1930287,861
1920256,491
1910213,381
Source

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

Battles & engagements in Denver

Military engagements that took place in Denver, Colorado.

First Denver Vigilante Hanging — John Stoefel
1860
Denver City Massacres
1864
Battle of Cherry Creek (Cheyenne Raid 1865)
1865
Denver — Soapy Smith Expelled by Citizens Committee
1890

Historic places in Denver

National Register of Historic Places listings in Denver, Colorado.

Grant-Humphreys Mansion
Denver
St. Paul's English Evangelical Lutheran Church
Denver
Trinity United Methodist Church
Denver
Smith's Irrigation Ditch
Denver
Tears-McFarlane House
Denver
Tivoli Brewery Company
Denver
St. Dominic's Church
Denver
Zang, Adolph, Mansion
Denver
Cheesman Park
Denver
Pearce-McAllister Cottage
Denver
Union Station
Denver
Doyle-Benton House
Denver
Evans Memorial Chapel
Denver
Loretto Heights Academy
Denver
U.S. Post Office and Federal Building
Denver
First Congregational Church
Denver
Colorado National Bank Building
Denver
Denver Public Library
Denver
Denver Municipal Auditorium
Denver
Joshel, Lloyd M., House
Denver
St. Mark's Parish Church
Denver
Oxford Hotel
Denver
Eppich Apartments
Denver
Mosque of the El Jebel Shrine
Denver
Browse all Coloradohistoric sites ›

Other counties in Colorado

Explore census history and historic records for more Colorado counties.

RouttSaguacheSan JuanSan MiguelSedgwickSummitTellerWashingtonWeldYumaAdamsAlamosaArapahoeArchuletaBacaBentBoulderBroomfieldChaffeeCheyenne
Unlimited access

Everything a full report reveals about Denver County, Colorado

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

Explore Colorado records

Coloradohistory ›NRHP historic sites ›Notable people from Colorado›

Frequently asked about Denver

When does Denver first appear in the US census?
Denver, Colorado first appears in the federal census in 1910, with a recorded population of 213,381.
What is the population of Denver?
At the most recent federal census (2020), Denver had a recorded population of 715,522.
Were any battles fought in Denver?
4 documented military engagements took place in Denver, including First Denver Vigilante Hanging — John Stoefel, Denver City Massacres, Battle of Cherry Creek (Cheyenne Raid 1865).
How many historic places are in Denver?
324 sites are listed on the National Register of Historic Places in Denver, Colorado.
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