World History Maps Interactive Historical Atlas of the Civil War, detail page for:

Illinois, State before Nov 6, 1860 - after Jun 25, 1865

John Wood US Governor, before Nov 6, 1860 - Jan 14, 1861
Illinois election results: Lincoln 172171 50.7%, Douglas 160215 47.2%, Bell 4914 1.4%, Breckinridge 2331 0.7%, Nov 6, 1860

Richard Yates US Governor, Jan 14, 1861 - Jan 16, 1865
US Dept. of The Ohio created Ohio Indiana and Illinois transferred from Dept. of the East., May 3, 1861
US Dept. of the West reorganized as Western Dept. including Iowa Minnesota Kansas Nebraska Colorado and Dakota Missouri and Illinois transferred from Dept. of the Ohio Dept. of New Mexico discontinued and absorbed, Jul 3, 1861
US Dept. of The Missouri created Minnesota Missouri Illinois and Iowa transferred from the Western Dept. Wisconsin included Western Kentucky transferred from Dept. of the Cumberland, Nov 9, 1861

US Dept. of the Ohio recreated Indiana Illinois Wisconsin eastern Kentucky western Ohio and western Michigan transferred from Dept. of the Mississippi eastern Ohio and eastern Michigan transferred from Dept. of the Potomac, Aug 19, 1862

US Northern Dept. created Michigan Ohio Indiana and Illinois transferred from Dept. of the Ohio, Jan 12, 1864
Cairo Illinois transferred from US Dept. of The Tennessee to Northern Dept., Jan 12, 1864
Cairo Illinois transferred from US Northern Dept. to Dept. of The Tennessee, Feb 8, 1864
Illinois election results: Lincoln 189512 54.4%, McClellan 158724 45.6%, Nov 8, 1864
Cairo Illinois transferred from US Dept. of The Tennessee to Northern Dept. US Dept. of Mississippi created Dept. of the Tennessee discontinued and absorbed, Nov 28, 1864

Richard J. Oglesby US Governor, Jan 16, 1865 - after Jun 25, 1865