Twenty-two-year-old Mona Tinder walked out of a group home in the 4600-block of West Jackson.
Tinder is described as standing 6'-2", weighing 200 pounds. She has hazel eyes and reddish brown hair.
Tinder was last seen wearing a tan jacket and black sweat pants.
Authorities say Tinder has a diminished mental capacity and does not know her home address.
Anyone with information should call Chicago police.