A display apparatus includes a substrate, a display area disposed on the substrate and including pixels, a non-display area disposed outside the display area, a first power supply voltage line including a first conductive layer disposed in the non-display area and a second conductive layer disposed on the first conductive layer, a second power supply voltage line disposed in the non-display area and including a third conductive layer spaced apart from the first conductive layer and a fourth conductive layer disposed on the third conductive layer, a first dam portion surrounding the display area and overlapping the second power supply voltage line, a second dam portion disposed adjacent to the first dam portion, and a cladding layer covering a first end portion of the fourth conductive layer formed in a direction intersecting a direction in which the first and second dam portions extend.