This study explored the factors influencing the disaster response competency, that is, demographic and disaster-related characteristics, personal disaster (household and workplace) preparedness, disaster risk perception, and self-efficacy in handling disasters among emergency medical technicians in South Korea.The study follows a descriptive, cross-sectional design and uses a self-reported questionnaire. Emergency medical technicians, amounting to 1,020 in all, currently working in firefighting organizations from four South Korean cities (Busan, Daegu, Daejeon, Ulsan) participated.Disaster risk perception, self-efficacy for disaster, participation experience in disaster education/training, and personal disaster (household and workplace) preparedness predicted the disaster response competency of emergency medical technicians in South Korea.There is a need for an anti-disaster program to enhance the disaster risk perception, self-efficacy, personal disaster (household and workplace) preparedness, and the disaster education/training participation rate toward enhancing the disaster response competency of emergency medical technicians in South Korea.