The DOE 2015 Occupational Radiation Exposure Report analyzes occupational radiation exposures at U.S. Department of Energy (DOE) facilities during 2015. This report includes occupational radiation exposure information for all DOE employees, contractors, subcontractors, and visitors. The 96 DOE organizations submitting radiation exposure reports for 2015 have been grouped into 32 sites. This information has been analyzed and trends over time are presented to provide a measure of DOE’s performance in protecting its workers from radiation.