Illinois Civil War Union Infantry Units

United States     U.S. Military      Illinois      Illinois Military      Illinois in the Civil War      Illinois Civil War Union Infantry Units

The information in this list of Military Units comes from the Civil War Soldiers and Sailors web site. That web site can also be searched by the name of a soldier.


 * 5th Regiment, Illinois Infantry "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 7th Regiment, Illinois Infantry Regiment organized at Cairo, Illinois, July 25, 1861. Mustered out July 9, 1865


 * 7th Regiment, Illinois Infantry (3 months, 1861) Organized at Camp Yates, Illinois, and mustered in April 12, 1861. Mustered out July 25, 1861.


 * 8th Regiment, Illinois Infantry Organized at Cairo, Illinois, for three years' service July 25, 1861. Mustered out at Baton Rouge May 4 and discharged at Springfield, Ill., May 13, 1866.


 * 8th Regiment, Illinois Infantry (3 months, 1861) Organized at Springfield, Illinois, and mustered in for three months' service April 25, 1861. Mustered out July 25, 1861.


 * 9th Regiment, Illinois Infantry (3 months, 1861) Organized at Springfield, Illinois, and mustered in for three months' service April 26, 1861. Mustered out July 26, 1861.


 * 9th Regiment, Illinois Infantry Organized at Cairo, Illinois, July 26 to August 31, 1861. Mustered out July 9, 1865.


 * 10th Regiment, Illinois Infantry Organized at Cairo,Illinois Illinois July 29, 1861. Mustered out July 4, 1865, and discharged at Chicago, July 11, 1865.


 * 10th Regiment, Illinois Infantry (3 months, 1861) Regiment formed from first four Companies reporting at Springfield, Illinois April 20, 1861, which were ordered to Cairo,Illinois April 22. Regiment fully organized by the addition of three other Infantry Companies and three Artillery Companies and mustered in for three months' service by Capt. John Pope, U. S. A., April 29, 1861. Attached to Prentiss' Brigade and on garrison duty at Cairo, Illinois till July. Mustered out July 29, 1861.


 * 11th Regiment, Illinois Infantry (3 months, 1861) Organized at Springfield, Illinois and mustered in April 30, 1861. Mustered out July 30, 1861.


 * 11th Regiment, Illinois Infantry Organized at Cairo, Illinois August 1, 1861.&lt;br Mustered out July 10, 1865, and discharged at Camp Butler, Illinois July 18, 1865.


 * 12th Regiment, Illinois Infantry Organized at Cairo, Illinois August 1, 1861. Mustered out July 10, 1865, and discharged at Camp Butler, Illinois July 18, 1865.


 * 12th Regiment, Illinois Infantry (3 months, 1861) Organized at Springfield, Illinois and mustered in May 2, 1861. Mustered out August 1, 1861 probably Cairo, Illinois.


 * 13th Regiment, Illinois Infantry Organized at Dixon, Ill., and mustered into State service April 21, 1861. Mustered into U. S. service by Capt. John Pope May 24, 1861, being the first three years Regiment from Illinois mustered into U. S. service. Mustered out June 18, 1864.


 * 14th Regiment, Illinois Infantry Organized at Jacksonville, Ill., and mustered in May 25, 1861. Mustered out at Fort Leavenworth, Kansas, September 18, 1865.


 * Veteran Battalion, 14th and 15th Regiment, Illinois Infantry "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 15th Regiment, Illinois Infantry Organized at Freeport, Ill., and mustered in May 24, 1861. Mustered out at Fort Leavenworth, Kansas, September 16, 1865.


 * 16th Regiment, Illinois Infantry Organized at Quincy, Ill., and mustered in May 24, 1861. Moved to Louisville,Kentucky, June 12. Mustered out July 8,1865 probably Louisville, Kentucky.


 * 17th Regiment, Illinois Infantry Organized at Peoria, Illinois., and mustered in May 24, 1861. Mustered out June 4, 1864, expiration of term.


 * 18th Regiment, Illinois Infantry Organized at Aurora, Illinois., and mustered into State service May 19, and into U. S. service May 28, 1861. Non-Veterans mustered out May 28, 1864. Regiment mustered out at Little Rock, Arkansas., December 16, and discharged, at Camp Butler, Illinois., December 31, 1865.


 * 19th Regiment, Illinois Infantry Four Chicago Companies mustered into State service at Camp Yates May 4, 1861. Regiment organized at Chicago, Illinois, and mustered in June 17, 1861. Moved to Chicago June 8-17. Mustered out July 9, 1864; expiration of term.


 * 20th Regiment, Illinois Infantry Organized at Joliet, Illinois, and mustered in June 13, 1861. Mustered out July 16 and discharged at Chicago, Illinois, July 24, 1865.


 * 21st Regiment, Illinois Infantry Organized at Mattoon, Illinois, and mustered in June 28, 1861. Mustered out at San Antonio, Texas, December 16, and discharged at Camp Butler, Illinois, January 18, 1866.


 * 22nd Regiment, Illinois Infantry Organized at Belleville, Illinois, and mustered in June 25, 1861. Mustered out July 7, 1864, expiration of term.


 * 23rd Regiment, Illinois Infantry Organized at Chicago, Ill., and mustered in June 15, 1861. Mustered out at Richmond, Virginia, July 24, and discharged at Chicago, Illinois, July 30,1865.


 * 23 Regiment, Illinois Infantry (Irish Brigade) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 24th Regiment, Illinois Infantry Organized at Chicago, Illinois, and mustered in July 8, 1861. Mustered out August 6, 1864. Expiration of term.


 * 25th Regiment, Illinois Infantry Organized at St. Louis, Missouri, and mustered in August 4, 1861. Mustered out at Camp Butler, Illinois, September 5, 1864.


 * 26th Regiment, Illinois Infantry Organized at Camp Butler, Illinois, and mustered in August 31, 1861. Moved to Louisville, Ky., June, and duty there until July. Mustered out July 20, and discharged at Springfield, Illinois, July 28, 1865.


 * From the 27th Regiment on, all units were infantry.  See the units arranged by number for the rest of the infantry regiments..