National Data Resources
Census Bureau Data
Census Bureau Data can be retrieved at various geographic levels and across years.
Community Opportunity Map
Interactive map allowing users to display data on health, education, economics, housing, and family well-being spatially. This data can be viewed by state, county, locality, and political districts.
Data.gov
This is the federal open data site, which includes data from city, county, state, and federal sources.
Federal Agency Data
Most federal agencies have their own data portals on this open data dashboard.
Not for Profit Data Sources
The following are some not for profit data sources: