This is Boulder County, Colorado
Boulder County is home to more than 300,000 residents and includes some of the most diverse, natural landscapes and sustainable development along the Northern Front Range of Colorado.
From visionary open space, land use and sustainability policies to forward-thinking and compassionate human services programs, our county government helps foster a vibrant, healthy and active community.
The county seat is the City of Boulder. Other incorporated towns and cities include: Erie, Jamestown, Lafayette, Longmont, Louisville, Lyons, Nederland, Superior, and Ward.
Boulder County is home to more than 300,000 residents and includes some of the most diverse, natural landscapes and sustainable development along the Northern Front Range of Colorado.
From visionary open space, land use and sustainability policies to forward-thinking and compassionate human services programs, our county government helps foster a vibrant, healthy and active community.
The county seat is the City of Boulder. Other incorporated towns and cities include: Erie, Jamestown, Lafayette, Longmont, Louisville, Lyons, Nederland, Superior, and Ward.
![CO 119 Bikeway 63rd St. Overpass Open House on Sept. 10](https://assets.bouldercounty.gov/wp-content/uploads/2024/08/cpp-co119-bikeway-63rd-street-overpass-rendering-featured.jpg)
CO 119 Bikeway 63rd St. Overpass Open House on Sept. 10
![First Human Case of West Nile Virus in Boulder County](https://assets.bouldercounty.gov/wp-content/uploads/2024/08/website-WNV-firstcase.jpg)
First Human Case of West Nile Virus in Boulder County
![Commissioners to Consider Temporary Moratorium on Site Plan Review Applications for Larger Houses, Pending Regulation Changes](https://assets.bouldercounty.gov/wp-content/uploads/2022/10/Commissioners-Hearing-Room-featured.png)
Commissioners to Consider Temporary Moratorium on Site Plan Review Applications for Larger Houses, Pending Regulation Changes
![Open House for the Boulder to Erie Regional Trail (BERT) Plan on August 29](https://assets.bouldercounty.gov/wp-content/uploads/2024/08/cpp-featured-bert-trail-rails-sunset.jpg)
Open House for the Boulder to Erie Regional Trail (BERT) Plan on August 29
![Health Guidance for Poor Air Quality Due to Wildfires on the Front Range](https://assets.bouldercounty.gov/wp-content/uploads/2024/07/website-air-advisory.jpg)
Health Guidance for Poor Air Quality Due to Wildfires on the Front Range
![Mosquitoes in Boulder County Test Positive for West Nile Virus](https://assets.bouldercounty.gov/wp-content/uploads/2024/07/website-WNV-PR.jpg)