On any given day last year, more than 600,000 Americans were homeless. The U.S. Department of Housing and Urban Development (HUD) provides state-level estimations of homelessness every year and also collects data on many metropolitan areas. In the U.S., about 195 of every 100,000 people were homeless in 2013.
According to a Washington Post report (be sure to check out their interactive map), the worst in terms of homelessness is the District of Columbia with a rate of 1,133 per 100,000 people. However, because D.C. is a metropolitan area, its count is far above states.
States with high and low homeless rates are all over the country. The highest rates of homelessness among states are in Hawaii (465 per 100,000), followed by New York (399) and California (367). You can access the HUD estimations here.
The lowest homeless counts per capita come in Mississippi (81 per 100,000), Indiana (94) and Kansas (94).