The U.S. Department of Labor (DOL)’s Office and Chief Evaluation Office (CEO) and the Veterans’ Employment and Training Service (VETS) requested a literature review in support of a 2015 assessment of DOL’s Homeless Veterans’ Reintegration Program (HVRP). This review synthesizes evidence from studies and reports related to homeless veterans published by the end of 2014, with a focus on identifying risk factors for homelessness among veterans.