Exemplary embodiments of the present invention relate to a backlight assembly and a display device, including a backlight unit including a light emitting diode (LED) light source of and a light guide, and a bottom chassis disposed at a rear surface of the backlight unit, wherein the bottom chassis includes a bottom chassis main body, an inner supporting member disposed at an inner surface of the bottom chassis main body, an outer supporting member disposed at an outer surface of the bottom chassis main body, and a fastener to fasten at least two of the bottom chassis main body, the inner supporting member, and the outer supporting member.