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Boulder County is a county located in the U.S. state of Colorado of the United States. As of the 2020 census, the population was 330,758. [1] The most populous municipality in the county and the county seat is Boulder. [2]
- Boulder, Colorado
With a population of 108,250 at the 2020 census, it is the...
- List of counties in Colorado
The City and County of Denver and the City and County of...
- Boulder, Colorado
With a population of 108,250 at the 2020 census, it is the most-populous city in the county and the 12th-most populous city in Colorado. Boulder is the principal city of the Boulder metropolitan statistical area, which had 330,758 residents in 2020, and is part of the Front Range Urban Corridor.
The City and County of Denver and the City and County of Broomfield are the only two Colorado counties with enclaves. Arapahoe County , Boulder County , and Jefferson County are the only three Colorado counties with exclaves .
CountyFips Code [5] [b]County Seat [6] [7]Est. [8]1902-11-151913-03-081861-11-011885-04-14Named for Boulder City and Boulder Creek (due to the plentiful boulders found therein, of course), Boulder County was one of the original 17 counties created by the Territory of Colorado on November 1, 1861. National protected areas include Arapaho National Forest, Roosevelt National Forest, Indian Peaks Wilderness, and James Peak Wilderness.
Boulder County encompasses 740 square miles of the western plains and Rocky Mountains in north central Colorado. The county straddles three unique geographic zones: mountains in the west, plains in the east, and a natural trough that runs between the plains and foothills.
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Boulder Map. Boulder is the county seat and most populous city of Boulder County and the 11th most populous city in the U.S. state of Colorado. Boulder is located at the base of the foothills of the Rocky Mountains at an elevation of 5,430 feet (1,655 m).