For more information on the US Census visit the:
American Community Survey:
These files are subsets of the IRS SOI Tax Stats - Exempt Organizations Business Master File Extract that contains records for tax-exempt, non-profit organizations in New York City that filed with the IRS. The majority of the orgs in the file are 501(c)(3), which are public charities and private foundations. Users should view the metadata included in the spreadsheet and the documentation provided by the IRS for details. Older extracts are available.