An organic light emitting diode display includes a substrate including a display area and a non-display area, a display unit that is formed in the display area and includes a plurality of subpixels arranged in a matrix form, a main ground line that is positioned at a first side of the non-display area and is formed using the same material as source and drain electrodes included in each subpixel, and an auxiliary ground line that is formed to surround the non-display area, overlaps at least a portion of the main ground line at the first side of the non-display area, is electrically connected to the main ground line, and is formed using the same material as a lower electrode included in each subpixel.