Rising rates of suicide fatality, attempts, and ideations among adolescents aged 10–19 over the past two decades represent a national public health priority. Theories that seek to understand suicidal ideation overwhelmingly focus on the transition from ideation to attempt and on a sole cognition: active suicidal ideation – the serious consideration of killing one’s self, with less attention to non-suicidal cognitions that emerge during adolescence that may have implications for suicidal behavior. A large body of research exists that characterizes adolescence not only as a period of heightened onset and prevalence of active suicidal ideation and the desire to no longer be alive (i.e., passive suicidal ideation), but also for non-suicidal cognitions about life and death. Our review synthesizes extant literature in the content, timing and mental imagery of thoughts adolescents have about their (1) life; and (2) mortality that may co-occur with active and passive suicidal ideation that have received limited attention in adolescent suicidology. Our “cognition-to-action framework for adolescent suicide prevention” builds on existing ideation-to-action theories to identify life and non-suicidal mortality cognitions during adolescence that represent potential leverage points for the prevention of attempted suicide and premature death during this period and across the life span.