Stickney is a village in Cook County, Illinois, United States. The village is named for Alpheus Beede Stickney, a railroad executive who played a central role in establishing the Clearing Industrial District. Per the 2020 census, the population was 7,110. It was well known in the 1920s and early 1930s as the home for several bordellos linked to mobster Al Capone's empire. The largest wastewater treatment plant in the world, the Stickney Water Reclamation Plant, is located within the village.