The Mellon International Dissertation Research Fellowship (IDRF), now closed, offered six to twelve months of support to graduate students in the humanities and humanistic social sciences who are enrolled in PhD programs in the United States and conducting dissertation research about US Indigenous or non-US cultures and societies. The IDRF program especially highlighted applicants from underrepresented institutions. Sixty fellowships were awarded annually. Fellowship amounts varied depending on the research plan, with a per-fellowship average of $23,000. The fellowship included participation in an SSRC-funded interdisciplinary workshop upon completion of IDRF-funded research.