The Aquatic Insects are helpful in purification of water in their capacity to act as scavengers. Narmada river is one of the most important river of India, which covers 98,796 sq. km of total water shed area. Narmada is considered to be life line and west flowing river of state Madhya Pradesh. Limnological study was carried out for a period of Twelve months from Oct 2019- Sep 2020 in selected stations of Narmada river. In present study various four Families of Ephemeroptera, 1 families of Odonata, 1 families of Plecoptera, 6 families of Hemiptera were recorded. In the present study the value of Shannon Weaver index varies from 2.7 to 3.1 indicating that the water is less polluted. Besides that the values of Simpson’s diversity index varies from 0.92 to 0.94 showing higher diversity of Aquatic Insects species. The result of the present study emphasizes the importance of conserving the world’s Aquatic Insects population, which are declining at an alarming rate through habitat destruction and pollution.