What is the population of Summit County?

The population of Summit County, CO is 30,631.

Where is Summit County located?

Summit County, CO is located at latitude 39.6341700 and longitude -106.1163800. It is in United States.

What is the area of Summit County?

The area of Summit County, CO is 1604 km².

What is the elevation of Summit County?

Summit County, CO has an elevation of 2887 meters (9472 feet) above sea level.

What time zone is Summit County in?

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

How has the population of Summit County changed?

The population of Summit County, CO has increased from 27,994 (2010) to 30,631 (2020), a change of 9.4%.

Summit County, Colorado

Summit County: county in Colorado, United States

About

Summit County is a county located in the U.S. state of Colorado. As of the 2010 census, the population was 27,994 and a population density of 17 people per km². After 10 years in 2020 county had an estimated population of 30,631 inhabitants. Its county seat is Breckenridge. The county was created 165 years ago in 1860.

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

County Snapshot

Summit County at a glance

Summit County currently has 6 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

Breckenridge

Population 4,954

Quick Facts about Summit County

Population	30,631 (2020)
Country	United States of America
State	Colorado (United States)
Different from	Summit County, Summit County
Area	1604 km²
Water as percent of area	1.8%
Land as percent of area	98.2%
Latitude & Longitude	39.6342,-106.1164
Named for	Continental Divide of the Americas
Capital	Breckenridge
Establishment	January 01, 1861
Time Zone	America/Denver
Local time	22:31:01 (18th April 2026)
Density	19 Pop. per km² as of 2020
Population growth	8.61% (2010-2020)
Weather	6℉ Mostly Cloudy then Slight Chance Snow Showers 7-days weather

Summit County court house in Colorado image

Geography

Summit County is located at 39°38'3"N 106°6'59"W (39.6341700, -106.1163800). It has 4 neighbors: Clear Creek County, Eagle County, Lake County and Park County.

Summit County map

Click "full screen"

icon to open full mode. View satellite images

The largest city of Summit County is Breckenridge with a population of 4,954. Other cities include, Silverthorne population 4,906, Frisco population 2,874, Dillon population 967 and Blue River population 928. See all Summit County cities & populated places.

Summit County Populated Places

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

City Name	Population	Title
Breckenridge	4,954	Town in Colorado, USA
Silverthorne	4,906	Town in Colorado, USA
Frisco	2,874	Town in Summit County, Colorado, United States of America
Dillon	967	Town in Colorado, USA
Blue River	928	Human settlement in Summit County, Colorado, United States of America
Montezuma	75	Town in Colorado, USA

Weather

6°F

Mostly Cloudy then Slight Chance Snow Showers

10 to 15 mph WNW Tonight

A slight chance of snow showers between 1am and 2am. Mostly cloudy. Low around 6, with temperatures rising to around 8 overnight. Wind chill values as...

7-Day Forecast

Official website of Summit County

Official Website

Summit County has 4 neighbours.

Clear Creek County county in Colorado, United States
Eagle County county in Colorado, United States
Lake County county in Colorado, United States
Park County county in Colorado, United States

Demographics

The population of Summit County increased by 8.61% in 10 years.

Year	Population	% Change	Method
2010	27,994	-	census
2011	28,042	0.17%	estimation process
2012	28,298	0.9%	estimation process
2013	28,728	1.5%	estimation process
2014	29,317	2.01%	estimation process
2015	30,045	2.42%	estimation process
2016	30,552	1.66%	estimation process
2017	30,820	0.87%	estimation process
2018	30,817	-0.01%	estimation process
2019	31,011	0.63%	estimation process
2020	30,631	-1.24%	estimation process

Comitatul Summit, Comte de Summit, Comté de Summit, Condado de Summit, Condado han Summit, Contea di Summit, Hrabstwo Summit, Okrug Samit, Quan Summit, Quận Summit, Sammit, Sumit, Summit, Summit Kun, Summit Kūn, Summit konderria, Summit megye, Summiti maakond, mqatʿt smyt, sa mi te xian, samita ka'unti, samitto jun, shhrstan samyt klradw, Округ Самит, Саммит, Самміт, Съмит, Սամիթ շրջան, سمٹ کاؤنٹی، کولوراڈو, شهرستان سامیت، کلرادو, مقاطعة سميت, সামিট কাউন্টি, サミット郡, 薩米特縣

Other places with the same name (2)

Summit County, Ohio county in northern Utah, United States with a population of 538,866 people.
Summit County, Utah county in northern Utah, United States with a population of 42,499 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.
Douglas County	360,750	County in Colorado, United States
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