Older adults consistently report a lower likelihood of engaging in health and safety risks (e.g., substance use, not wearing seatbelts) than younger adults. However, the mechanisms that explain this age difference are not clear. Greater dispositional mindfulness is associated with lower engagement in health risk behaviors, and older adults tend to score higher in dispositional mindfulness than younger adults. Thus, we tested whether older adults’ greater dispositional mindfulness helped to explain their lesser health and safety risk-taking propensity. Two community-dwelling samples of younger (25–36 years) and older (60+ years) adults completed self-report measures of dispositional mindfulness and health and safety risk-taking propensity. In Study 1, older adults reported greater dispositional mindfulness and a lower likelihood to engage in health and safety risk behaviors than younger adults. Greater dispositional mindfulness was associated with lesser health and safety risk-taking propensity. Importantly, older adults’ greater dispositional mindfulness partially accounted for their lesser health and safety risk-taking propensity. These findings were replicated in Study 2, and an alternative mechanism (i.e., perceived health) was ruled out. The results suggest that age-related decreases in health and safety risk behaviors may be statistically explained, in part, by dispositional mindfulness. The current research has implications for behavioral interventions intended to increase preventative health behaviors and decrease health risk behaviors.