The SMA houses internal papers from LGBTQI organizations and businesses. These papers include meeting minutes, financial records, correspondences, political position papers, posters and fliers for events, and more. The Organizational Collections are materials donated either from or connected to LGBTQI voluntary, for-profit, and not-for-profit groups and organizations, as well from LGBTQI businesses. Many of the Organizational Collections are from Lesbian and Transgender groups, as well as from papers for LGBTQI organizations. They date from the 1970s to the present and are from organizations in Chicago, Illinois, Northampton, Massachusetts, and Amherst, Massachusetts. They include a number of papers from organizations that the Curator of the SMA, Ben Power Alwin, was once a part of.
The following Organizational Collections are housed at the SMA:
- East Coast FTM Group, Northampton, MA
- Lesbian Feminist Center, Chicago, IL
- Northampton Area Lesbian & Gay Business Guild, Northampton, MA
- PFLAG (Parents and Friends of Lesbians and Gays), Amherst, MA/Franklin Hampshire County Chapter Archives, TNET (Transgender Network), 1996-2001, and TSON (Transgender Special Outreach Network) 1996-2002
- Shelix, Northampton, MA
- Trans Activist Network, Amherst, MA
- Venture Out, Northampton, MA
- Womonfyre Books, Northampton, MA
- New Alexandria Lesbian Library, Founded in Chicago, IL and moved to Northampton, MA
- Out Books on Wheels, Northampton and Holyoke, MA
- Sexual Minorities Educational Foundation, Northampton and Holyoke, MA
- Fantasia Fair, Provincetown, MA
- New England Trans United (NETU) / Northampton Trans Pride Rally, Northampton, MA
Sexual Minorities Archives 