IL · CountyDeKalb County, Illinois14 cities in the directoryCitiesCityPopulationRegionCortland4,592—DeKalb40,491—Genoa5,514—Hinckley1,976—Kingston1,095—Kirkland1,621—Lee308—Malta1,137—Maple Park1,482—Sandwich7,299—Shabbona852—Somonauk1,761—Sycamore18,968—Waterman1,543—