The problem of homelessness is widespread and challenging in the United States. The sources listed on this page will help you to get an overall "big picture" view of the problem. Determining the actual extent of the problem is not easy. The U.S. Census Bureau gathers all sorts of statistics on the population of the United States, based on where they live, using a home address. How do we gather information about the people who have no home address? As you do your research, you'll see that this poses a unique challenge.