A backlight unit and a display device including the same are provided. The display device includes: a bottom cover; a backlight unit in which a light assembly is disposed in at least one corner area of the bottom cover; and a light arriving portion formed by bending at least one corner area of the bottom cover, wherein the backlight unit includes: a substrate coupled to the light arriving portion and in which a first surface in which the light assembly is disposed and a second surface bent from the first surface are provided, and at the first and second surfaces, a plurality of leads connected to the light assembly are disposed.