Oscar Sanchez, 69, was last seen Sunday in the 2800 block of South Archer Avenue in the Brighton Park neighborhood, according to a CPD missing person alert.
Sanchez is 5-foot-6, 147 pounds with brown eyes and gray hair.
He is known to frequent the area around the 1600 block of South Racine Avenue, police said.
Sanchez was last seen wearing a black baseball cap, a black and gray winter coat, black jeans and silver/blue gym shoes.
Anyone with information on his whereabouts is asked to contact Area Three detectives at (312) 744-8266.