How many homeless are there in America?

3.5 million

As many as 3.5 million people experience homelessness in a given year (1% of the entire U.S. population or 10% of its poor), and about 842,000 people in any given week. Most were homeless temporarily. The chronically homeless population (those with repeated episodes or who have been homeless for long periods) fell from 175,914 in 2005 to 123,833 in 2007.