The family is an important factor that influences an individual’s decision for organ donation. The number of studies addressing the family’s role in organ donation is limited. It is imperative to explore these studies and offer recommendations that may help in addressing organ shortage. 15 studies with more than 2100 participants were selected for a systematic review. The studies were accessed by searching three databases: MEDLINE, Elsevier, and PsycINFO. This systematic review indicates that knowledge about brain death and the circumstances surrounding organ donation and transplantation are the most important factors that affect a family’s decision regarding organ donation. Educational efforts targeting the family should be initiated, which can then guide the family’s decision on organ donation. We suggest that educational efforts be consistent with other factors such as religious beliefs that influence the family’s decision.