U.S. Census Bureau
Census presents counts and information collected from all people and housing units. It contains detailed population and housing data. Information is available at State, County, Municipality, and census tract level with maps, and data profiles.

Bureau of Primary Healthcare (BPHC)
The Bureau of Primary Health Care (BPHC) aims that underserved and vulnerable people get the health care they need.

National Association of Community Health Centers (NACHC)
The NACHC is the national trade association serving and representing the interests of America's community health centers.

Health People 2010 (medical link)
Healthy People is the prevention agenda for the Nation and is updated every ten years. Healthy People is based on the best scientific knowledge and is used for decision making and for action. Healthy People 2010 is designed to achieve two overarching goals. First goal is to increase quality and years of healthy life and the second goal is to eliminate health disparities.