Assisted outpatient treatment (AOT) is the practice of providing outpatient treatment under civil court order to individuals with severe mental illness (SMI) who have demonstrated difficulty engaging with treatment on a voluntary basis. When systematically implemented and adequately resourced, AOT can dramatically reduce hospitalization, criminalization, and other adverse outcomes for its target population. Although AOT is authorized by law in nearly every state, most states have a substantial unmet need for programmatic implementation on a local level. This National AOT Symposium and Learning Collaborative is a this one-of-a-kind gathering of national, state, and local assisted outpatient treatment champions, implementers, and practitioners. Together, we will learn from one another, build on what we know, and celebrate the lives we are transforming through AOT.