Aurora Community Overview As Colorado’s third-largest city, Aurora boasts innovative businesses, well-connected neighborhoods, unparalleled diversity of cultures, and enough land to attract more development and become even stronger. Aurora By The Numbers 389,264 Population Multiple-County Place, 48,657 in Adams County $72,052 Median Income 160 Square Miles 60 in Adams County Community Details Targeted Industries Expand Aerospace & Defense Bioscience/Healthcare Advanced Manufacturing Logistics Energy Major Employers Expand Amazon Children’s Hospital of Colorado Eaton Lighting Kärcher North America Myco Technology Raytheon Contacts Expand City of Aurora Aurora Economic Development Council