McHenry County Boundries
for US Congressional District 16

  includes the following precincts:
 

Riley Township, Marengo Township, Dunham Township, Chemung Township, Alden Township, Hartland Township, Seneca Township, Coral Township, Grafton Township, Nunda precincts 2, 3, 5, 7, 9, 10, 11, 13, 14, 15, 18, 22, 25 and 29; and Algonquin Township.