The world’s largest outbreak of Ebola virus disease began in West Africa in 2014. Although few cases were identified in the United States, the possibility of imported cases led US public health systems and health care facilities to focus on preparing the health care system to quickly and safely identify and respond to emerging infectious diseases. In New York City, early, coordinated planning among city and state agencies and the health care delivery system led to a successful response to a single case diagnosed in a returned health care worker. In this article we describe public health and health care system preparedness efforts in New York City to respond to Ebola and conclude that coordinated public health emergency response relies on joint planning and sustained resources for public health emergency response, epidemiology and laboratory capacity, and health care emergency management. (Disaster Med Public Health Preparedness. 2017;11:370–374).