In this systematic review, we aim to provide an up-to-date appraisal of the literature pertaining to the use of EEG in DLB and address the following: (1) can EEG be used to differentiate DLB from other dementias?; (2) what are clinical correlates of EEG in DLB?; (3) can EEG be used to predict response to cholinesterase inhibitors?; and (4) can EEG be used to diagnose prodromal DLB and predict conversion to dementia? Here, BCHE is linked to Lewy body dementia.