Best Choices:
Statista
Provides access to recent statistics and studies including market researchers, trade organizations, scientific journals, and government databases.
eMarketer
Detailed marketing data. See the video tutorial.
Social Explorer
Demographic data, maps, and profile reports of the United States.
Also Try:
Access to social science data and analysis tools. Demographic data for New York City, New York State, and the United States. Data from the U.S. Census Bureau.ICPSR (Inter-university Consortium for Political and Social Research) — must create login
Infoshare Online
U.S. Census Bureau
Research Guides
A library research guide for finding online information about the demographics of New York neighborhoods. A library research guide for statistical resources.New York City Neighborhood Demographics
Statistical Resources