The Roundtable on Population Health Improvement brings together multiple sectors and disciplines to broaden the national conversation about the factors that shape our health and to inform and support cross-sector relationships and engagement to transform the conditions for health across U.S. communities. By hosting workshops, spurring individually-authored papers, and organizing action collaboratives, the roundtable brings together members and outside experts, practitioners, community members, researchers, and decision makers in dialogue about models and frameworks, good practices and tools, and the evidence to provoke and catalyze urgently needed multi-sector community engaged collaborative action.