Dengue is a serious and worldwide spreading illness caused by the mosquito Aedes aegypti bite. Seasonal variation in dengue outbreak has been noticed by many years and it is a systematically increase. The study was designed to apply district epidemiological field that is time, place and person. With the other epidemiological determinant including finding the etiology behind dengue outbreak. Data was collected at Shri Muktsar sahib with the reported cases of dengue at Guru Gobind Singh Medical College including the convenient sampling technique with total enumeration. Case confirmation was done by serological examination for dengue fever. Out of 812 reported cases, 399 were positive for dengue. Dengue outbreak caused higher morbidity which might have resulted in morbidity and fatality of dengue fever in district At that point the situation was turned into the outbreak. It has been seen at Shri Muktsar Sahib District, from being a sporadic illness, outbreaks of dengue have now become a regular occurrence. The reason behind this outbreak is water storage and improper sanitation.