• Data.Census.Gov

  Data.census.gov is a platform to access data and digital content from the U.S. Census Bureau. It combines several previous census tools like American Fact Finder, Census Business Builder, DataFerret and Current Population Survey. Contains data beginning in 2010.

• Social Explorer

Social Explorer is a web-based mapping and data visualization tool. Access is provided by the Yale University Library to everyone at Yale. Explore over 500,000 data indicators and over 220 years of data for the United States from present to 1790, including all Decennial Censuses, American Community Surveys and many other datasets.

• PolicyMap

  Subscription resource with data on demographics, health, education, inequality, and more. For additional information about using PolicyMap: http://guides.library.yale.edu/policymap.

• IPUMS

  Normalized census data that works with other data sets

• Dartmouth Atlas of Healthcare  uses Medicare data to provide information and analysis about national, regional, and local markets, as well as hospitals and their affiliated clinicians
• ICPSR is an archive of digital datasets in social sciences and related areas.

These resources are meant as starting points for your research. Keep in mind that statistics at the neighborhood level are not available consistently across the entire United States, and that some datasets and statistical publications may not be produced on an annual basis. If you aren't finding what you need with these databases, a good next step is to find out if there's a local government agency that compiles this data, and either use the agency's online tools or publications, or contact the agency directly to find out if they will make their data available to you.