The study enumerates 64 taxa of the order Chlorococcales from the wetlands of Bhagalpur district, Bihar, India out of 32 samples (two per a station) collected from 16 community development blocks in the district during the three seasons from Dec. 2020 to Nov. 2022. The algae identified represent 34 genera, namely of Actinastrum (2 spp.), Acutodesmus (1 sp.), Ankistrodesmus (4 spp.), Chlorella (1 sp.), Choricystis (1 sp.), Coelastrum (3 spp.), a species each of Comasiella, Crucigenia, Dactylococcus, Desmodesmus (9 spp.), a species each of Hydrodictyon, Kirchneriella, Lacunastrum, Lemmermannia, Messastrum, Micractinium (2 spp.),\ Monactinus (1 sp.), Monoraphidium (1 sp.), Oocystis (3 spp.), Neglectella (1 sp.), Pediastrum (6 spp.), Scenedesmus (8 spp.), Schroederia (2 spp.), Sorastrum (2 spp.), Stauridium (1 sp.), Steinedesmus (1 sp.), Tetradesmus (4 spp.), and a speices each of Tetraedron, Verrucodesmus, and Willea. Of these taxa, Actinastrum hantzschii, Ankistrodesmus falcatus, Chlorella vulgaris, Coelastrum microsporum, Desmodesmus abundans, Neglectella solitaria, Pediastrum simplex, P. duplex, Scenedesmus maximus, Tetradesmus dimorphus and T. lagerheimii were frequent throughout the wetlands sampled, they happen to be high pollution-tolerant species, indicating that these freshwater bodies are trending towards eutrophification.