An organic light-emitting diode display is disclosed. In one aspect, the display includes a plurality of data lines formed in a display area and a plurality of data pad portions formed in a non-display area and including a plurality of data pads and a plurality of dummy pads formed outside of the data pads. The display also includes a plurality of data fan-out portions electrically connected to the data pads and the data lines, and including a plurality of diagonal portions diagonally formed with respect to the data lines. The display also includes a plurality of voltage applying lines electrically connected to the dummy pads and insulated from the data fan-out portions, wherein at least one of the voltage applying lines intersects one or more of the diagonal portions.