Abstract-Dengue outbreak occurs in Indonesia, including Medan. We selected socio-demographic profile of the community, its behavior and environment in order to see dengue dynamic within the same location. Medan Baru represents the highest reported case, and Medan Area, for the lowest reported case. A total of 840 respondents, calculated by WHO's rapid survey (2 x 210 from each sub-district). Respondents were the head of household (male or female) and have been living in the area for a minimum of two consecutive years. Questionnaires were distributed to assess the demographic profiles, knowledge, attitude and practice. Environment assessment made to measure environmental risk. We found that Medan Area carryinga higher risk of dengue.The majority of respondents was adults, women, those living in permanent homes and whose educational background was up tosecondary high school or less.Most respondents lived in their own house and spent most of their time in the morning outside the home to work. Respondents' knowledge of and attitude towards dengue were relatively good.Generally, the respondents participated in some efforts to prevent dengue. Many mosquito'slarvae were still present in more than 1 container. After deployed binary logistic regression atα=0,05, the risk factors of dengue in Medan Area were higher to those who performed activities at home in the morning with poor quality of hygiene both inside and outside home.This research concluded that people were highly exposed to the risk of dengue when they failed to maintain and manage a healthy living environment maximally.