Here's the source I think you are citing: http://www.nationalhomeless.org/factsheets/Mental_Illness.pdf http://www.nationalhomeless.org/factsheets/Mental_Illnes

Here's the source I think you are citing: http://www.nationalhomeless.org/factsheets/Mental_Illness.pdf http://www.nationalhomeless.org/factsheets/Mental_Illness.pd... 20-25% is a pretty high number, especially when you compare it to the 6% of Americans with a severe mental illness. I can't find any good estimates for the percent of homeless with any form of mental illness. A good question (which I can't find an answer to) is what is the percentage of the long term homeless population that suffers from severe mental illness?