West Branch (1967)

Area:  In ILLINOIS, Counties of  Adams, Alexander, Bond, Brown, Calhoun, Cass, Christian, Clinton, DeWitt, Franklin, Greene, Jefferson, Jersey, Jonson, Logan, Macon, Macoupin, Massac, Menard, Montgomery, Morgan, Pulaski, Pike, Sangamon, Schuyler, Scott, Washington and Williamson.