The present study was undertaken to study the seasonal algal diversity of Mahi Bajaj Sagar Dam at Borkheda village of Banswara district of Rajasthan state. From January to December 2023, the periodicity of Chlorophyceae algae of Mahi bajaj Sagar Dam,was investigated.In this study 29 species in all, representing 17 genera in the Chlorophyceae class, were found. The Chlorophyceae of Mahi Bajaj Sagar Dam included several common genera, including Scenedesmus, Closterium, Spirogyra, Cosmarium, and Pe