Present work was carried out at Nawargaon Lake, Maregaon Taluka, District-Yavatmal, Maharashtra, India on phytoplankton and zooplankton. During study period phytoplankton community was represented by four group’s viz., Cyanophyceae, Bacillariophyceae, Chlorophyceae and Euglenophyceae. Among the four, Cyanophyceae was the most dominant group. The phytoplankton abundance was evident during monsoon season. The zooplanktons were represented by four group’s viz., Rotifera, Cladocera, Copepoda and Ostracoda. Among these Rotifera exhibited numerical dominance. The aquatic weeds found in the lake included species of Eichornia, Hydrilla, Marsilia, Meriophyllum, Chara, Ipomea, Najas and Vallisneria.