Try searching for alternate terms, such as charities, foundations or charitable organizations.
These sources have information on individual charities and non-profit organizations.
The Rustandy Center for Social Sector Innovation at the Booth School of Business provides access to datasets compiled from IRS Filings, covering 2003 - 2019. Contact Alissa Bolz, Associate Director of Research Partnerships and Strategy at the Rustandy Center to get access
More information on what's included is in this PDF
These sources have summary statistics on charities and charitable giving.
These are print directories. Links go to library locations.