Health.gov The Office of Disease Prevention and Health Promotion presents information on dietary and physical activity guidelines, health literacy, quality and safety.
Morbidity and Mortality Weekly Report is a weekly report of cases of 50 notifiable diseases, nationally and by state, and compared with the past 5 years.
National Vital Statistics System a division of the National Center for Health Statistics, Centers for Disease Control, calls itself the “oldest and most successful system” for sharing and linking birth and mortality data from the 50 states and territories.
Substance Abuse and Mental Health Services Admin. (SAMHSA) The Data, Outcomes and Quality section lets one search or browse by topic for surveys and reports on mental health and substance abuse.
Health and Retirement Study from the National Institute of Aging, University of Michigan. Biannual survey of the demographics, health status, measures of social and economic well-being of U.S. population over age 50. Free registration with a username and password is required to download the data files.
National Center for Health Statistics, a part of the federal Center for Disease Control, provides datasets and statistics on a variety of health topics
Agency for Healthcare Research & Quality part of DHHS, focuses on health quality and safety.
NIH Institutes and Centers list of NIH's 27 research centers; many include fact sheets and statistical reports
HealthReach From the National Library of Medicine, health information in many languages
SAMHSA Substance Abuse and Mental Health Services Administration the agency within the U.S. Department of Health and Human Services that leads public health efforts to advance the behavioral health of the nation