Boulder County is a county located in the U.S. state of of the United States. As of the 2010 census, the population was 294,567. The most populous municipality in the county and the county seat is .Boulder County comprises the Boulder, CO Metropolitan Statistical Area, which is included in the , CO Combined Statistical Area.

Localities in the Area

The historic Town of is a Statutory Town in Boulder County, , United States. Photo: Paltron, CC BY-SA 4.0.

is an unincorporated community and a census-designated place located in and governed by Boulder County, , .

is an unincorporated community and a census-designated place located in and governed by Boulder County, , .


40.1026° or 40° 6' 9.2" north
-105.3632° or 105° 21' 47.5" west
Open Location Code
6765 feet (2062 metres)
Open­Street­Map ID
node 316945055
Geo­Names ID
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Also Known As

  • Albanian: Boulder County
  • Arabic: Condado han Boulder, Colorado
  • Arabic: مقاطعة بولدر
  • Arabic: مقاطعه بولدر، كولورادو
  • Armenian: Բոլդեր շրջան
  • Basque: Boulder konderria (Colorado)
  • Basque: Boulder konderria
  • Bavarian: Boulder County, Colorado
  • Belarusian: Боўлдэр
  • Bishnupriya: বৌল্ডার কাউন্টি, কলোরাডো
  • Bishnupriya: বৌল্ডার কাউন্টি
  • Bulgarian: Боулдър
  • Catalan: comtat de Boulder
  • Cebuano: Boulder County
  • Chechen: Боулдер (гуо, Колорадо)
  • Chechen: Боулдер
  • Chinese: Boulder Kūn
  • Chinese: 博尔德县
  • Chinese: 圓石縣
  • Chinese: 圓石郡
  • Czech: Boulder County
  • Dutch: Boulder County
  • English: Boulder County, Colorado
  • English: Boulder County
  • Estonian: Boulderi maakond
  • Finnish: Boulderin piirikunta
  • French: Comté de Boulder
  • French: comté de Boulder
  • Georgian: ბოულდერის ოლქი
  • German: Boulder County
  • Hebrew: מחוז בולדר
  • Hungarian: Boulder megye
  • Irish: Contae Boulder, Colorado
  • Italian: Contea di Boulder
  • Italian: contea di Boulder
  • Japanese: ボルダー郡
  • Korean: 볼더군
  • Low German: Boulder County
  • Marathi: बोल्डर काउंटी, कॉलोराडो
  • Min Dong Chinese: Boulder Gông
  • Min Nan Chinese: Boulder Kūn
  • Northern Frisian: Boulder County (Colorado)
  • Northern Frisian: Boulder County
  • Norwegian: Boulder County
  • Norwegian Bokmål: Boulder County
  • Persian: شهرستان بولدر، کلرادو
  • Polish: Hrabstwo Boulder
  • Portuguese: Condado de Boulder
  • Romanian: Comitatul Boulder, Colorado
  • Romanian: Comitatul Boulder
  • Russian: Боулдер
  • Sardinian: contea de Boulder
  • Scottish Gaelic: Boulder County
  • Serbian: Округ Болдер
  • Serbo-Croatian: Boulder County, Colorado
  • Serbo-Croatian: Boulder County
  • Spanish: Condado de Boulder
  • Swedish: Boulder County
  • Tatar: Боулдер (округ, Колорадо)
  • Tatar: Боулдер
  • Turkish: Boulder County
  • Ukrainian: Баулдер
  • Ukrainian: Боулдер
  • Urdu: بولڈر کاؤنٹی، کولوراڈو
  • Vietnamese: Quận Boulder
  • Waray (Philippines): Condado han Boulder
  • Welsh: Boulder County, Colorado
  • Welsh: Boulder County
  • Western Panjabi: باؤلڈر کاؤنٹی
  • Quận Boulder, Colorado

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About Mapcarta. Thanks to Mapbox for providing amazing maps. Data © OpenStreetMap contributors and available under the Open Database License. Text is available under the CC BY-SA 4.0 license, excluding photos, directions and the map. Based on the page Boulder. See this page's contributions. Photo: Paul Sableman, CC BY 2.0.