What is the population of Douglas County?

The population of Douglas County, CO is 360,750.

Where is Douglas County located?

Douglas County, CO is located at latitude 39.3297200 and longitude -104.9295600. It is in United States.

What is the area of Douglas County?

The area of Douglas County, CO is 2183 km².

What is the elevation of Douglas County?

Douglas County, CO has an elevation of 1948 meters (6391 feet) above sea level.

What time zone is Douglas County in?

Douglas County, CO is in the America/Denver time zone.

How has the population of Douglas County changed?

The population of Douglas County, CO has increased from 285,465 (2010) to 360,750 (2020), a change of 26.4%.

Douglas County, Colorado

Douglas County: county in Colorado, United States

About

Douglas County is a county located in the U.S. state of Colorado. As of the 2010 census, the population was 285,465 and a population density of 131 people per km². After 10 years in 2020 county had an estimated population of 360,750 inhabitants. Its county seat is Castle Rock. The county was created 164 years ago in 1861.

Douglas County locator map — Location of Douglas County on Colorado map.

County Snapshot

Douglas County at a glance

Douglas County currently has 11 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Colorado counties

Open related pages

Largest city

Highlands Ranch

Population 96,713

Quick Facts about Douglas County

Population	360,750 (2020)
Country	United States of America
State	Colorado (United States)
Different from	Douglas County, Douglas County, Douglas County, Douglas County, Douglas County, Douglas County, Douglas County, Douglas County, Douglas County, Douglas County, Douglas County
Twitter username	douglascountyco
Area	2183 km²
Water as percent of area	0.3%
Land as percent of area	99.7%
Latitude & Longitude	39.3297,-104.9296
Named for	Stephen A. Douglas
Capital	Castle Rock
Establishment	November 01, 1861
Time Zone	America/Denver
Local time	20:55:47 (18th April 2026)
Density	165 Pop. per km² as of 2020
Population growth	20.87% (2010-2020)
Weather	53℉ Sunny 7-days weather

Second Douglas County CO county building IMG 5196 image

Geography

Douglas County is located at 39°19'47"N 104°55'46"W (39.3297200, -104.9295600). It has 5 neighbors: Elbert County, Arapahoe County, El Paso County, Jefferson County and Teller County.

Douglas County map

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The largest city of Douglas County is Castle Rock with a population of 70,567. Other cities include, Parker population 58,673, Castle Pines population 11,664, Carriage Club population 1,090 and Larkspur population 203. See all Douglas County cities & populated places.

Douglas County Populated Places

Cities, towns, neighborhoods & other populated places in Douglas County.

City Name	Population	Title
Highlands Ranch	96,713	Census designated place
Castle Rock	70,567	The most populous city in Douglas County, Colorado.
Parker	58,673	The most populous city in Douglas County, Colorado.
Castle Pines	11,664	City in Douglas County, Colorado, United States of America
The Pinery	10,517	Census designated place
Roxborough Park	9,099	Census designated place
Stonegate	8,962	Census-designated place in Douglas County, Colorado
Acres Green	3,007	Census-designated place (CDP) in northern Douglas County, Colorado, United States
Perry Park	1,646	Census-designated place in Douglas County, Colorado
Carriage Club	1,090	Town
Larkspur	203	Human settlement in Douglas County, Colorado, United States of America

Weather

53°F

Sunny

6 mph NNE This Afternoon

Sunny. High near 53, with temperatures falling to around 51 in the afternoon. North northeast wind around 6 mph.

7-Day Forecast

Official website of Douglas County

Official Website Twitter

Douglas County has 5 neighbours.

Elbert County county in Colorado, United States
Arapahoe County county in Colorado, United States
El Paso County One of the 64 counties in the U.
Jefferson County county in Colorado, United States
Teller County county in Colorado, United States

Demographics

The population of Douglas County increased by 20.87% in 10 years.

Year	Population	% Change	Method
2010	285,465	-	census
2011	292,548	2.42%	estimation process
2012	298,708	2.06%	estimation process
2013	306,234	2.46%	estimation process
2014	314,545	2.64%	estimation process
2015	322,025	2.32%	estimation process
2016	328,219	1.89%	estimation process
2017	335,816	2.26%	estimation process
2018	342,989	2.09%	estimation process
2019	351,154	2.33%	estimation process
2020	360,750	2.66%	estimation process

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Other places with the same name (11)

Douglas County, Nebraska county in Oregon, United States with a population of 574,332 people.
Douglas County, Georgia county in Georgia, United States with a population of 147,988 people.
Douglas County, Kansas county in Kansas, United States with a population of 122,530 people.
Douglas County, Oregon county in Oregon, United States with a population of 111,364 people.
Douglas County, Nevada county in Nevada, United States with a population of 49,088 people.
Douglas County, Wisconsin county in Wisconsin, United States with a population of 43,702 people.
Douglas County, Washington county in the state of Washington, United States with a population of 43,560 people.
Douglas County, Minnesota county in Minnesota, United States with a population of 38,328 people.
Douglas County, Illinois county in Illinois, United States with a population of 19,510 people.
Douglas County, Missouri county in Missouri, United States with a population of 13,344 people.
Douglas County, South Dakota county in South Dakota, United States with a population of 2,906 people.

Colorado Other Counties (more counties)

County Name	Population	Title
Denver	735,538	The twentieth most populous city in the United States and the center of the Denver metropolitan area.
Denver County	735,538	County in Colorado, United States, coterminous with the City of Denver
El Paso County	728,310	One of the 64 counties in the U.
Arapahoe County	657,452	County in Colorado, United States
Jefferson County	583,283	County in Colorado, United States
Adams County	519,883	County in Colorado, United States
Colorado Springs	482,131	The second most populous city in Colorado and the center of the Colorado Springs metropolitan area.
Aurora	387,377	The third most populous city in Colorado and the center of the Denver metropolitan area.
Larimer County	360,428	County in Colorado, United States
Weld County	333,983	County in Colorado, United States
Boulder County	327,171	County in Colorado, United States
Pueblo County	169,823	County in Colorado, United States
Fort Collins	168,234	The fifth most populous city in Colorado.
Lakewood	157,429	The fifth most populous city in Colorado.
Mesa County	155,603	County in Colorado, United States
Thornton	148,113	The seventh most populous city in Colorado.