Diversity of bivalve and gastropod molluscans from Lower Manair Dam freshwater habitat was studied during the study period June 2017 to May 2019. A total of 22 species of molluscan community was represented by two classes, 3orders under 8 families. The represented class Gastropoda contributed to highest with 66.67% and Bivalvia lowest with 33.33% in the total orders. The class Gastropoda represented to highest with 68.18% species and order Bivalvia with 31.82% species in the population. Order Mesogastropoda contribute to highest with 50.00% species, followed by Unionida with 31.19% species and Basommatophora with 18.18% species in the population. The identified species classified into Class, Order, Family Scientific name and IUCN (2020-2) were recorded during study period.