The slipcover for dog collars is a fabric sleeve designed to slide onto the collar, covering the entire collar except the metal bracket and tongue of the buckle. A strip of fabric, slightly narrower than the sleeve and with an elastic loop at the end, is attached to and extends from the open end of the slipcover. The strip fits through the buckle and has a thin slot medially aligned for the tongue of the buckle to pass through. The loop at the end of the strip attaches to a button near the base of the strip on the open end of the slipcover, on the inner side. A plurality of openings are medially aligned near the closed end of the sleeve. The collar is fastened onto the dog's neck in the ordinary fashion, passing the tongue through any of the openings near the closed end of the slipcover.