Suicide is a complex problem that requires ongoing solutions implemented by many sectors of society. Although behavioral health agencies are often tasked with leading suicide prevention efforts, responsibility lies with the whole community. No single agency or sector can solve this complex issue alone, but a diverse coalition that is truly representative of the community can ensure that prevention gets the attention it deserves, as well as provide ongoing feedback and support to existing local agencies and their efforts. This guide provides a step by step approach to creating Suicide Prevention Coalitions, including 1) exploring purpose, 2) recruiting the right people, 3) developing a successful structure, 4) implementing activities, and 5) maintaining engagement.