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Boulder County Colorado Government Online
For purchase: digital ortho photos, assessor parcels, road centerline, and more.
For free: general maps, general distribution GIS layers, GIS landpoints, and more.
Bureau of Land Management - Colorado
For free: Areas of Critical Environmental Concern, National Monument, National Conservation Areas, Wilderness Areas, Wilderness Study Areas, Wild Horse and Herd Areas, Field Office Areas, State Boundary, Land Ownership, Land Grid Description, Land Grid Nodes, Land Grid Polygons, Land Grid Sections, Land Grid Townships. 
Colorado Division of Emergency Management (CDEM) - Cartography/GIS Section
Along with GIS data, this site has files in .pdf and .jpeg formats and geographic tables.
For free: county boundaries; municipal boundaries; Title 32 special district boundaries; school district boundaries; 1995 & 2000 Census Bureau Tiger Data; 1990 & 2000 Census Data; and others. 
Colorado Division of Water Resources
Division of the Department of Natural Resources.
Colorado Oil and Gas Conservation Commission
Division of the Colorado Department of Natural Resources.  "Maps" link leads to "COGCC GIS Online," which has GIS downloads available.
For free: Well Locations, Other Oil & Gas Facility Locations, Oil & Gas Permit Locations, Fruitland Pictured Cliffs Contact & Buffer.
Downloadable data for use with ESRI GIS software.  Not all data covers the state of Colorado.
For purchase: GDT Dynamap/2000 U.S. Street Data, Titan Sure!MAPS RASTER Data, and FEMA Q3 Flood Data.
For free: ESRI World Basemap Data,  Census 2000 TIGER/Line Data, and USGS NED Shaded Relief Imagery Data. 
FreeGIS Database
Not all data covers the state of Colorado.
For free: many listings for geo-data.
Natural Resources Conservation Service (NRCS)
Data Resources, Geospatial Data Gateway, Imagery, National Resources Inventory (NRI), State of the Land, National Cartography and Geospatial Center (NCG), NRCS GIS and Data Sites, PRISM, and World Soils Maps.
U.S. Census Bureau American FactFinder
For free:  population, housing, economic, and geographic data.
U.S. Census Bureau Geography
Geographic Programs, TIGER-page, LandView-6, MAPS and Mapping Resources, Census Tract Resources, Understanding Census Geography - Reference Resources, Census 2000 Geographic Products, Online Guide to Cartographic and Geographic Resources, and Map of U.S. Census Bureau, Washington, DC and Vicinity.
U.S. Fish and Wildlife Service: Colorado Spatial Data Sets
For free:  larger scale data (1:24,000 up to 1:500,000) for wetlands, refuge boundaries, public use roads, parking areas and more.
USGS Rocky Mountain Mapping Center Front Range Wildfire Response
For free: files for Bobcat Fire and High Meadow Fire.
2004 - 2009 Shannon M. Steuber

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