Thomas J. Greenwood (1908–1988) was an Illinois labor and Indian affairs activist, of Scottish and Cherokee descent.
Greenwood worked as the manager of a shipyard during World War II and was noted for his hiring of Oklahoma Indians and women.
In 1961, while chairman of the American Indian Chicago Conference, he helped establish and present to President john F. Kennedy proposoed federal "Indian policy ... as an alternative to the harsh policies of the previous administration."
He was instrumental in a "successful campaign to preserve 92 miles along the historic Illinois and Michigan Canal" from a proposed propject that would turn it into a landfill.
He presented a plan for a realistic pow-wow during the Tri-Centennial Marquette and Joliet Re-enactment.