A display device includes a display unit having a non-rectangular shape. A plurality of data lines and a plurality of gate lines intersect each other in the display unit. A plurality of gate in panel (GIP) circuits are arranged in a non-display region of the display device that has a shape corresponding to the shape of the display unit, and each of the GIP circuits is connected to a respective gate line. A plurality of GIP lines are connected to the GIP circuits. The GIP lines transmit respective gate control signals to the GIP circuits, and the GIP circuits apply gate signals to the gate lines based on the gate control signals. Source lines are arranged in the non-display region, and transmit respective data signals to the plurality of data lines. At least one data line is arranged parallel to the gate lines in the non-display region.