Aim of this study was to determine the presence of potential mosquito vectors in the Irinjalakuda Municipality. Urban and semi-urban characteristics of Irinjalakuda municipality provide suitable breeding habitats for different species of mosquito vectors. Mosquito larvae were collected from 25 selected sites of the study area from July 2012 to June 2013. A total of 30 species belonging to 5 genera, Anopheles, Aedes, Culex, Mansonia and Armigeres were collected and identified using systematic keys. The vectorial capacity of these mosquito species was discussed.