Bureau of Labor and Statistics
http://stats.bls.gov/
A site with statistical information on various subjects such as economical and regional information. Also, it includes links to other statistical sites. Searchable by keyword.

National Institute of Mental Health
http://www.nimh.nih.gov/
Information on the Institute's clinical studies, extramural and intramural research programs, and research reports on genetics, children, parity, and prevention.

Substance Abuse and Mental Health Services Administration
http://www.samhsa.gov/
This site provides information on prevention, treatment, and rehabilitation services in order to reduce illness, death, disability, and cost to society resulting from substance abuse and mental illnesses.