Boulder, Colorado

Boulder: The most populous city in Boulder County, Colorado. It is located in the foothills of the Rocky Mountains. Boulder is known for its many colleges and universities, its many parks and green spaces, and its many attractions, such as the University of Colorado Boulder and the Boulder Creek Path.


Boulder is a city located in the county of Boulder in the U.S. state of Colorado. Its population at the 2010 census was 97,385. After 10 years in 2020 city had an estimated population of 107,645 inhabitants.

The city was created 166 years ago in 1857.

Boulder is a city located in Boulder County, Colorado, United States. It is home to the main campus of the University of Colorado and is located at the base of the Rocky Mountains Foothills. Boulder has consistently been ranked as one of the healthiest, happiest, most educated, and most creative cities in the United States.

Geography and Climate

The geography of Boulder consists of dramatic, tree-covered hills and cliffs overlooking the city with spectacular views of the Rocky Mountains. The climate is characterized by abundant sunshine, low humidity, and moderate precipitation. Winters are usually mild and summers are hot during the day but cool down into the 50s or 60s at night.

Economy and Culture

The economy of Boulder relies heavily on the high-tech industry and tourism. Major technology companies such as IBM and Ball Aerospace have significant presences in Boulder. The thriving culture includes a pedestrian downtown area with boutiques, restaurants, theaters, and art galleries. The city has a reputation for environmentalism and outdoor recreation.


As a base for exploring the Rocky Mountains, Boulder is a popular tourist destination. Attractions include the scenic Boulder Creek path, Eldorado Canyon State Park, the famous Flatirons rock formations, and the historic Chautauqua park at the base of the Flatirons. Hiking, rock climbing, mountain biking, and other outdoor activities are extremely popular. The famous Pearl Street Mall draws visitors downtown.


Education is highly valued in Boulder. The main campus of the University of Colorado educates over 30,000 students and is the city's biggest employer. Naropa University is a leader in contemplative education. There is also a thriving startup and tech scene with investors and incubators supporting new companies. With its high quality of life, thriving economy and culture, and proximity to nature, Boulder is considered one of America's best places to live.

Boulder locator map
Location of Boulder on Colorado map.

Quick Facts about Boulder

Population : 107,645 (2020)
Country : United States of America
State : Colorado (United States)
County : Boulder County
Water as percent of area : 3.97%
Land as percent of area : 96.03%
Altitude : 5,430 feet / 1655 meters
Capital city : Boulder is capital of Boulder County
Establishment : January 01, 1858 (166 years ago)
Time Zone : Mountain Time Zone, UTC−07:00
Local time : 17:58:24 (15th July 2024)
Postal code : 80301
Population growth : 9.53% (2010-2020)
BoulderBearPeak image
BoulderBearPeak image


Boulder is located at 40°0'54"N 105°16'14"W (40.0149900, -105.2705500).

Boulder map

  • Dushanbe
  • Ramat Negev Regional Council (2018 )
  • Yamagata (1994 )


The population of Boulder increased by 9.53% in 10 years.

Year Population % Change Method
2010 97,385 - census
2011 100,137 2.75% estimation process
2012 101,160 1.01% estimation process
2013 102,719 1.52% estimation process
2014 104,451 1.66% estimation process
2015 106,742 2.15% estimation process
2016 107,128 0.36% estimation process
2017 106,447 -0.64% estimation process
2018 106,008 -0.41% estimation process
2019 105,673 -0.32% estimation process
2020 107,645 1.83% estimation process

Boulder zip code is 80301. County name: Boulder, County fips: 08013

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People born in Boulder (153)

People born in Boulder, including United States Navy admiral and Navy Cross recipient Arleigh Burke, actress Kristin Davis, genetics scientist Edward Tatum, .


  • John Fante (1909–1983; American novelist, short story writer and screenwriter of Italian descent) he was born in 08/04/1909
  • Harl McDonald (American conductor) he was born in 27/07/1899
  • Jello Biafra (American singer and activist) he was born in 17/06/1958
  • Scott Carpenter (American test pilot, astronaut and aquanaut) he was born in 01/05/1925
  • Taylor Phinney (American racing cyclist) he was born in 27/06/1990
  • Jonathan Vaughters (American racing cyclist and team manager) he was born in 10/06/1973
  • Harold Camping (American doomsday prophet) he was born in 19/07/1921
  • Donald C. Spencer (American mathematician) he was born in 25/04/1912
  • Timothy Duggan (Road racing cyclist) he was born in 14/11/1982
  • Paula Smith (American tennis player) she was born in 10/01/1957
  • Blake Caldwell (American racing cyclist) he was born in 27/03/1984
  • Carolyn Cole (American photojournalist) she was born in 24/04/1961
  • Betty MacDonald (American writer) she was born in 26/03/1908
  • Jesse Carmichael (American musician) he was born in 02/04/1979
  • Colby Pearce (American cyclist) he was born in 12/06/1972
  • Andrew Bajadali (American bicycle racer) he was born in 01/05/1973
  • Casey Puckett (American alpine skier) he was born in 22/09/1972
  • Mara Abbott (American racing cyclist) she was born in 14/11/1985

Schools in Boulder

College & universities near Boulder, CO

Code Name City ZIP
127653 Naropa University Boulder (CO) 80302-6697
126614 University of Colorado Boulder Boulder (CO) 80309-0017
127954 Montessori Education Center of the Rockies Boulder (CO) 80301
454810 Auguste Escoffier School of Culinary Arts-Boulder Boulder (CO) 80305
262466 Rolf Institute of Structural Integration Boulder (CO) 80301-0000

Stations (11)

Amtrak & bus stations near Boulder, CO

Code Name Address Type
BLD Boulder, Colorado 30th & Diagonal Highway BUS
LGM Longmont, Colorado 623 Main St. BUS
DEN Union Station 1701 Wynkoop Street RAIL
DEB Denver (Bus Station), Colorado 1055 19th Street BUS
WIP Fraser – Winter Park 205 Fraser Avenue RAIL

Post offices near Boulder

Post Office Name City ZIP
Boulder Post Office Boulder (CO) 80302
High Mar Post Office Boulder (CO) 80305
Valmon Post Office Boulder (CO) 80301
Eldorado Spring Post Office Eldorado Springs (CO) 80025
Louisvill Post Office Superior (CO) 80027

Other places with the same name (2)

Other cities in Boulder County

Cities, towns, neighborhoods & other populated places in Boulder County , CO.

City Name Population Title
Longmont 98,445 The most populous city in Boulder County, Colorado.
Erie 30,318 Town in Boulder County, Colorado, USA
Lafayette 28,579 City in Colorado
Louisville 19,060 City in Colorado
Superior 13,413 Statutory Town in Boulder and Jefferson counties in the U.
Niwot 4,006 Census designated place
Lyons 2,058 Town in Boulder County, Colorado, United States
Nederland 1,557 Town in Colorado, United States
Coal Creek 350 Town in Fremont County, Colorado, United States
Jamestown 254 Town in Colorado, USA
Ward 168 Town in Colorado, United States

Distance to Other Cities

Boulder distances to largest Colorado cities