A display device includes: a display unit including pixels, wherein each of the pixels includes stacks connected in series and each of the stacks includes a light emitting element; a storage to store pieces of stack number information, wherein each of the pieces of the stack number information indicates the number of stacks constituting an effective light source from among the stacks for each of the pixels; a compensator to generate compensated data by compensating image data based on the pieces of the stack number information; and a data driver to generate data voltages based on the compensated data and to provide the data voltages to the display unit. The pixels are to emit light with luminances corresponding to the data voltages.