The National Alliance to End Homelessness is a nonpartisan organization committed to preventing and ending homelessness in the United States.

In 1983, a group of concerned leaders founded the National Citizens Committee for Food and Shelter to help meet the emergency needs of a growing population of homeless people across the country. By 1987, it was clear that despite the Committee's success, homelessness had taken root for a number of systematic reasons and a "hot and a cot" were not going to end the problem.  At that time, the organization became known as the National Alliance to End Homelessness. The Alliance grew from a federation of more than 2,000 providers and public agencies to a current network of over 7,000 partners, making the Alliance the largest partnership dedicated to ending homelessness.

From 2003 to 2007, the Alliance expanded its organizational capacity considerably in the areas of policy, capacity building, education, and research. In 2003, the organization broadened its program and policy focus to include health issues that affect homeless people. In 2004, the Alliance launched the Center for Capacity Building, focused at that time primarily on assisting communities to develop plans to end homelessness. In 2006, the Alliance launched the Homelessness Research Institute, the research and education arm of the organization. Finally, first in 2005 and then 2007, the Alliance expanded its program and policy expertise in the area of youth homelessness.