For many, including military veterans and their families, support between individuals with shared lived experiences, or peer support, has long been utilized as a way to support each other through many different challenges. Building on other reviews and guided by the seven domains of well-being in the Canadian veteran well-being framework, the objective of this paper is to describe and catalogue the nature of peer support activities and related outcomes in the veteran, serving member, and family member populations. A scoping review following the five stages outlined by Arksey and O’Malley was conducted; it was guided by the question: What is currently known about peer support activities for veterans, serving members, and their families that has been evaluated in the literature? In total, 101 publications from 6 different countries were included in this review and catalogued based on publication characteristics, participant information, peer support activity information, and peer information. Peer support activities have the potential to positively influence the well-being of veterans, serving members, and their families on a holistic level across multiple domains. This scoping review highlights the existing gaps in the literature and provides an important foundation for future research on peer support for these populations, specifically in the Canadian context.