Zooplankton are an important link between the photosynthetic phytoplankton and upper trophic levels, including many commercially important species.   Little is known of the species composition of zooplankton and patterns of seasonal abundance in the Barnegat Bay. Water was collected on a weekly basis from off a bulkhead in the northern Barnegat Bay, and filtered to obtain zooplankton samples which were subsequently analyzed for species composition and abundance. Additional data was collected upon salinity, dissolved oxygen content, percent oxygen saturation and water temperature. Copepods dominated spring and early summer samples, with taxa being more evenly represented throughout the rest of the year. Dominant genera of copepods in our samples were Acartia, Calanus and Centropages.  Harpacticoid copepods were also common in our samples. Copepod abundance peaked between March and April, but abundances rarely exceeded 30 individuals L^-1. Other crustaceans as well as annelids and larval fish were most numerous during the months of May and June. Salinity, temperature and oxygen concentrations of the water appeared to have no impact on abundance of copepods.