Illinois Counties with the most and highest percentage of democrat voters; the most and highest percentage of republican voters and the most and highest percentage of other voters in the 2016 presidential election.

Illinois Metropolitan Areas: Bloomington - Carbondale-Marion - Centralia - Champaign-Urbana - Charleston-Mattoon - Chicago-Naperville-Elgin - Danville - Davenport-Moline-Rock Island - Decatur - Effingham - Freeport - Galesburg - Jacksonville - Kankakee - Lincoln - Macomb - Ottawa-Peru - Peoria - Pontiac - Quincy - Rockford - Springfield - St. Louis - Sterling