Abstract Despite the urgency reported by the National Institutes of Health and National Academy of Sciences to advance health knowledge about transgender, nonbinary, and gender diverse (TNGD) older adults, TNGD populations remain underrepresented in aging research. This review examines TNGD older adult recruitment approaches in health-related research. PubMed, CINHAL, and PsychINFO databases were searched using key terms/subject headings related to TNGD and aging/older adults to identify health-related, U.S.-based empirical studies published since 2011. Twenty-four studies met inclusion criteria (quantitative=15, qualitative=8, mixed-methods=1). Most (n=13) focused recruitment efforts on the broader LGBTQ community, whereas 9 studies (qualitative, n=5) specifically targeted TNGD older adults. One study that recruited from Amazon Mechanical Turk, but most TNGD-specific recruitment efforts used community-engaged approaches, including snowball and purposive sampling via listservs; groups, organizations, and events serving the transgender/nonbinary community; and outreach through researchers’ personal and professional networks. Novel approaches are needed to increase TNGD representation in aging research.