Zooplankton plays an important role in aquatic food webs by fluxing of energy from primary producer tosubsequent trophic levels in the food chain. The annual patt of zooplankton communities and potentialenvironmental drivers were studied in the Kohelia channel, Bangladesh from summer 2014 to spring 2015.Samples were collected using net at a depth of 1 m. A total of 32 species belonged to 18 orders, 27 families and 15taxonomic groups were identified. Of these species, 22 distributed in all four seasons of which 8 were dominantand highly contributing to the total communities. Species number peaked in summer next to winter and fall inspring while maximum abundance was in summer and minimum in spring. Multivariate analyses showed thatthere was a clear annual patt in the zooplankton communities. Species diversity and evenness peaked inspring but fall in autumn while the high value of species richness was found in winter. Biological-environmentalbest matching (BIO-ENV) analyses conformed that community patt of zooplankton was mainly driven bytransparency salinity, and temperature individually or combined with water nutrients. These results demonstratethat annual patt of the zooplankton community shaped by channel environmental factors in subtropicalchannel ecosystems, thus might be used for community-based subtropical coastal water bioassessment.