How many people are homeless? One approximation of the annual number of homeless in America is from a study by the National Law Center on Homelessness and Poverty, which estimates between 2.3 and 3.5 million people experience homelessness.
How many of the homeless are children? One out of fifty - or about 1.5 million American children are homeless each year according to a 2009 study by the National Center on Family Homelessness.
What is the greatest cause of homelessness? For families and individuals, the most commonly cited causes, according to a 2008 U.S. Conference of Mayors study (pdf) are: Lack of affordable housing Poverty Unemployment Substance abuse Mental illness