Marangeli Velasquez disappeared last Wednesday -- and failed to show up for school.
She reportedly was with two other girls in the area of 79th Street and South Jeffrey Boulevard.
She was last seen wearing jeans -- a black sweater -- navy blue short-sleeve school shirt -- and white gym shoes.
Velasquez is five-feet one-inch tall -- and weighs 150 pounds.
Anyone spotting Merangeli Velasquez is asked to contact Chicago police.