Provided is a display device having a touch sensor capable of improving touch sensitivity by removing the influence of display noise. The display device includes: a display panel including pixels connected to data lines and scan lines; a scan driver for supplying scan signals to the pixels through the scan lines; a data driver for receiving digital image data, converting the digital image data into an analog data signal, and supplying the analog data signal to the pixels through the data lines; a data variance calculator for calculating a variance in image data for each data channel by using the digital image data, and summing the variance in image data for each data channel to calculate an integrated data variance value; and a plurality of correction value calculators for calculating a touch correction value for each sensing channel by using the integrated data variance value.