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.
Funding Applications Open for 2026 Circular Economy Projects
Resource Conservation Division has opened grant applications for 2026 Circular Economy Fund projects. Applications are due by Sept. 30, 2025.
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Federal Actions Impacting the Latino Community: August 18 Event
On August 18, the Boulder County Commissioners will host a discussion on how federal actions are impacting the Latino community in housing, health, climate, business, and basic needs
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Boulder County Enacting Stage 1 Fire Restrictions on August 12, 2025
Sheriff Curtis Johnson has enacted Stage 1 Fire Restrictions, effective August 12, 2025, at 12:01 a.m. for unincorporated areas of western Boulder County.
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Boulder County Driver and Cycling Laws and Guidelines
View laws and resources to help cyclists and drivers arrive safely to their destinations.
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Flood Preparedness from City of Boulder and Boulder County’s Office of Disaster Management
Important information on flood preparedness from the City of Boulder and Boulder County's Office of Disaster Management.
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Mosquitoes in Boulder County Test Positive for West Nile Virus
Seguido en español —Boulder County Public Health (BCPH) has confirmed the first West Nile virus (WNV) positive mosquitoes for this... read more →
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