Benthic macroinvertebrates are important food sources for higher trophic levels in lake & reservoir food webs. Hence, diversity of littoral zone benthic macroinvertbrates of Rewabandh reservoir was studied during July, 2021 to December, 2021. Altogether two site of the littoral zone of the Rewabandh reservoir were sampled for benthic Macroinvertbrates by using of an Ekman dredge soil sampler and Secured in bucket and water was added to it. Using “US standard Sieve No. 40. The whole sample was sieved to obtain the benthos with help of forceps for preserving the same in bottle. The water quality data for Rewabandh reservoir indicated that pH was in alkaline range and Electrical Conductance values were above 0.20 mS in this water body. On the basis of visibility values of Rewabandh reservoir were categorized as “hypereutrophic Based on alkalinity values have been found highly productive. On the other hand nitrate –nitrogen values of Rewabandh reservoir were “Mesotrophic “whereas on the hardness were “Moderately hard”. The diversity of Macroinvertbrates was fairly good in the Rewabandh reservoir as evident from 27 Species. The average density obtained for the five benthos was in the following order of dominance: Chironomus Larvae (448) > Melanoides tuberculata (114) > Bellamya bengalensis (110) Gyraulus convexiusculus (80) > Psychoda larvae (74) No./m2. The total number of macroinvertebrate species ranged from 1166 to 1357 No/m2. The Odum and Menhinick’s indices showed lowest diversity in Rewabandh reservoir. Chironmus Larvae, Lymnaea acuminata and Melanoides tuberculata may be used as pollution indicators in Rewabandh reservoir. From the present investigation, it is inferred that littoral zone benthic macro-invertebrate community can be useful in evaluating the localized effects of organic enrichment in the lentic water ecosystem.