Although traumatic brain injury (TBI) is a major cause of disability for adults over the age of 65, knowledge gaps and clinically relevant differences in TBI injury, recovery, and outcomes in this age group limit evidence-based care guidance. The National Academies organized a public workshop in October 2024 to explore what is known about TBI among older adults, discuss unmet research needs, and consider opportunities to address gaps and support the translation of new knowledge to practice.