ABSTRACTVulnerable populations tend to have the worst health outcomes during and after disasters; however, these populations are rarely included in the emergency planning process. In Philadelphia, the Department of Public Health and the Office of Emergency Management have reached out to community-based organizations that serve vulnerable populations to include these key stakeholders in emergency planning. In this article, we outline strategies for locating, engaging, and communicating with vulnerable populations about both organizational and personal emergency preparedness. Such strategies include creating a method for bidirectional communication via a free quarterly health newsletter that is distributed to community-based organizations serving vulnerable populations. We also note successes and next steps from engaging vulnerable populations in the planning process in Philadelphia.(Disaster Med Public Health Preparedness. 2010;4:246-251)