BoCo Alert System

Level 1 Fire Restrictions in effect for western Boulder County (more). See flyer and map for details.

Plats, Maps & GIS

Plats, Maps & GIS

Find maps and GIS (Geographic Information System) data for Boulder County. Use these tools to find property information using the Assessor online interactive map tool (E-mapping find information related to parks, trails, open space, crime, elections, energy efficiency, and more.

Boulder County GIS

GIS technology is an integral part of many Boulder County functions. Learn more about GIS data available for download.

Land Use GIS & Maps

Review GIS data and maps used by the Land Use department for zoning, comprehensive plans, and land use code.

Mountain Addressing System

The Boulder County Mountain Addressing System is based on a mile-point/street-name system designed to expedite emergency response.