Find maps and Geographic Information System (GIS) data for Boulder County. Use these tools to find facts about property, zoning, parks, trails, open space, crime, elections, energy use, and more.
Scam emails have been impersonating Boulder County Community Planning and Permitting staff. Learn how to spot a scam email.
Plats, Maps and GIS
Boulder County GIS
Boulder County uses GIS for many of its services. Learn more about the county’s open data catalog. GIS data is also available for download.
Land Survey Plats
Boulder County keeps survey plats on file. State law requires this under Colorado law 38-51-107. Use the Survey Plat Lookup tool to find a plat.
Land Use Planning Maps
The Community Planning and Permitting department uses GIS maps. These maps show 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. It helps emergency crews find homes faster.
Natural Disaster Maps
View maps of natural disasters in Boulder County. This includes the Fourmile Canyon Fire and the 2013 flood.
Public Health and Safety Data
Boulder County collects and maintains data on various health issues. The county shares this data with residents, groups, and agencies. This includes Youth Risk Behavior data and Sex Offender Registry.
Open Space Maps
View maps of the Boulder County open space properties and trails.
Roads and Transportation Maps
View maps of bike routes, traffic, snowplow priority routes, and road projects.