The present paper documents the preliminary study on insect abundance and diversity of insect species in diversity through funnel trap in three selected districts of West Bengal conducted during September 2021 to April 2022. A total of 405 insects from 7 orders, 21 families were recorded. This study shows that Diptera (46%) was the most dominant order according to total number of individuals, followed by Coleoptera (27%), Hymenoptera (13%), Collembola (6%), Hemiptera (4%), Diplura (2%), and Lepidoptera (2%). The present study was also conducted to determine the abundance of insect species; species richness, dominance and evenness of insect fauna from different districts. The Simpson’s Index diversity is highest in Paschim Medinipur (0.4486) and lowest in South 24-Parganas (0.2738). The species richness, evenness and diversity of insects were calculated by Margalef’s Index, Pielou’s Index and Shannon-Wiener Index respectively.