Tyler Wilson, 22, who is serving time at HMP Hatfield for a section 18 wounding assault, has gone missing.
CCTV footage shows Wilson leaving the open prison at around 7.23pm on May 9. He has not returned since.
Wilson has links to Wheatley and Barnby Dun. He is described as white, around 5ft 9ins tall with short, brown hair.
Anyone with information about Wilson’s whereabouts can call 101 quoting incident number 965 of May 9.