Duff Hill (, meaning black hill) at , is the 78th-highest peak in Ireland on the Arderin scale, and the 97th-highest peak on the Vandeleur-Lynam scale. Duff Hill is in the middle section of the Wicklow Mountains, in Wicklow, Ireland, and is part of the large massif of Mullaghcleevaun , which lies to its south. Gravale , lies to its immediate north.