A coil component includes a body including a first surface and a second surface opposing in a first direction, a third surface and a fourth surface disposed between the first surface and the second surface and opposing in the second direction, and a fifth surface and a sixth surface disposed between the first surface and the second surface and opposing in the third direction; a coil disposed in the body and forming a plurality of turns; an insulating wall surrounding a side surface of the coil; an insulating layer covering the coil in the third direction; and an external electrode connected to the coil. A length of the insulating layer in the third direction is a1, a length of an outermost side wall in the first direction, disposed on an outermost side of the insulating wall in the first direction, is b, and 2.11%