Background: The dengue virus belonging to the Arthropod - Borne Virus, the genus Flavivirus and the family Flaviviridae is the cause of Dengue Hemorrhagic Fever (DHF). Transmisson of Dengue Hemorrhagic Fever caused by Aedes mosquito bite, especially Aedes Aegypti or Aedes Albopticus. Dengue Hemorrhagic Fever still be one of problem in Kelurahan Wirobrajan and Sumberagung village. There is one factor that affect the incident of Dengue Hemorrhagic Fever, that is knowledge of society about Dengue Hemorrhagic Fever. Behavioural characteristics between City Community and Villagers are different, where City Community more individual and independent while Villagers have habit of working together. The purpose of this study to know correlation of knowledge about Dengue Hemorrhagic Fever toward incident of Dengue Hemorrhagic Fever at Endemic City Wirobrajan and Endemic Village Sumberagung. Method: The type of research in this study was non experimental with analytic observational research design using cross sectional approach, with cluster sampling technique with a total sample of 777 respondens. The instrument used is questionnaire about knowledge of Dengue Hemorrhagic Fever. Test analysis using sperman test. Result: The results of this study found (p = 0,005) for people in Sumberagung Village and (p = 0,000) for people in Wirobrajan. This shows that there is correlation of knowledge about Dengue Hemorrhagic fever toward incident of Dengue Hemorrhagic Fever at Endemic City Wirobrajan and Endemic Village Sumberagung. Conclution: there is correlation of knowledge about Dengue Hemorrhagic fever toward incidence of Dengue Hemorrhagic Fever at Endemic City Wirobrajan and Endemic Village Sumberagung.