A long with the increasing human need for information spurs the rapid development of technology in the field of information and telecommunications. Current technological advances can also help ease human work. This includes facilitating the dissemination of information regarding natural disaster mitigation with the aim of minimizing the risks and impacts of natural disasters. To reduce the risk of natural disasters that can occur at any time, this is the reason a website for developing citizen journalism knowledge management systems for disaster mitigation was created in Selogedong Hamlet. The hamlet of Selogedong, Argodadi, Sedayu, Bantul, Yogyakarta is an area that is often affected by the eruption of Mount Merapi and tectonic earthquakes because the location of this hamlet is in the middle between Mount Merapi and the South Coast of Java.The steps taken in this research, namely: field surveys to Selogedong Hamlet, conducting interviews with community samples, analyzing results to be used as a reference to determine user needs, system analysis using Data Flow Diagrams and Entity Relationship Diagrams, making initial display designs, followed by implementation and system maintenance.With the website for developing citizen journalism, a knowledge management system for disaster mitigation, the public can get information about disaster mitigation which includes disaster knowledge, disaster tips, important information, citizen journalism. Media knowledge about disaster mitigation is increasing so that a citizen journalism feature is made to answer user needs as a place to express ideas and share information from the community to the wider community.