Despite the research on a health-disparate population, less is known about the social determinants of health (SDOH) inequities among older lesbian, gay, bisexual, and transgender (LGBT) adults. This scoping review aimed to explore and summarize what is known in the literature regarding the SDOH among older LGBT adults. The Joanna Briggs Institute's (JBI) approach guided this scoping review, which examined 31 articles that included quantitative, qualitative, and mixed-method studies. Data were analyzed by three independent reviewers through a predesigned process of data charting, descriptive summary, and thematic analysis. Older participants were primarily LGBT and LGB. The findings identified four intersecting dimensions of individuals, social, economic, and health care system, contributing to health inequities and poor health outcomes. Given the importance of SDOH for older LGBT adults, stakeholders including health care providers need to better understand the multiple intersecting influences, provide culturally congruent health care, and integrate sources of support into the care of these sexual- and gender-minority older adults.