Increasing numbers of older adults are participating in competitive sports as a form of physical activity. Sport participation among older adults has considerable physiological, psychological, and social benefits. However, participation in sport is not without its risks, most notably, the risk of injury. Researchers have begun to examine the physiological factors related to injury in older adult sport participants. In contrast, very little attention has been paid to the psychological factors related to injury in older adult sport participants. One psychological factor that is suggested to be related to injury in sport is perceived risk of injury (Kontos et al., 2000; 2001). The perceived risk of injury construct consists of four interrelated components: (a) probability of injury, (b) worry of injury, (c), confidence in avoiding injury, and (d) consequences of injury. Researchers have reported that self-efficacy and gender influence perceptions of risk of injury and subsequent injury outcomes (Kontos et al., 2001; Short et al., 2001). Hence, the purpose of this study was to determine the interrelationships among perceived risk, self-efficacy, gender and injury in older adult sport participants. The participants for this study were 91 (52 male, 39 female) older adult sport participants with a mean age of 55.0 (SD=13.0) years. The sample was drawn from state level Senior Olympic and club level sports, including basketball, track and field, swimming, and tennis. Prior to their competitions, subjects completed a questionnaire about their sport injury history, perceived risk of injury, self-efficacy in their respective sports, and demographic information. A series of correlations, MANOVAs, and regression analyses were conducted to assess the relationships among the predictor and demographic variables and injury outcomes. Results indicated that 34% of the sample had been injured in the previous year while playing sports. Overall, the older adults in this study reported relatively low levels of perceived risk of injury in sport. Females reported higher probability, worry, and consequences of injury than males, whereas males reported higher levels of confidence in avoiding injury and self-efficacy than females. As expected, probability and worry about injury were negatively correlated with confidence in avoiding injury and positively related to the perceived consequences of injury. Using perceived risk of injury and self-efficacy, we were able to correctly predict injury status in 88% of the sample. The results suggest that perceived risk of injury is an important psychological factor related to injury among older adult sport participants.Keyword(s): athletics/sports, older adult/aging issues, safety/injury prevention