1. Census 2020, Colorado, Unified School Districts Shapefile State-based
U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Spatial Data Collection and Products Branch. The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census... U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Spatial Data Collection and Products Branch.