Data.gov provides access to federal open government data as well as data from state, local, and tribal governments.
Social Explorer is an online research tool designed to access current and historical U.S. Census data and demographic information. It contains maps, profile reports, data elements, and variables.
Offers population, housing, economic, trends, and geographic data.
Provides a single point of access to Health Resources and Services Asministration (HRSA) programmatic information, related health resources, and demographic data that focuses on uninsured, underserved, and special needs populations.
Provides data sets generated by the HUD Office of Policy Development and Research. Effors include the American Housing Survey, HUD median family income limits, and microdata from research initiatives such as housing discrimination, the HUD-insured multifamily housing stock, and the public housing population.
Presents maps, text, and data about the creation and all subsequent changes (dated to the day) in the size, shape, and location of every U.S. county in the 50 states as well as the District of Columbia.
Provides comprehensive data and downloadable shapefiles on the formation, development, and fluidity of county borders within the territory of the United States from 1629 to 2000.
Offers citations and abstracts about the earth sciences including palaeontology.
Maintains a global reference on the environment, energy, and natural resources.
Archives social science data that includes aging, child care, criminal justice, demography, education, political science as well as public and mental health.