Civil War Wiki
42nd Regiment Illinois Volunteer Infantry
Illinois state flag
Active July 22, 1861 to December 16, 1865
Country United States
Allegiance Union
Branch Infantry
Engagements Battle of Chickamauga
Battle of Resaca
Siege of Atlanta
Battle of Franklin
Battle of Nashville

The 42nd Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.


The 42nd Illinois Infantry was organized at Chicago, Illinois and mustered into Federal service on July 22, 1861.

The regiment was mustered out on December 16, 1865.

Total strength and casualties[]

The regiment suffered 13 officers and 168 enlisted men who were killed in action or mortally wounded and 5 officers and 201 enlisted men who died of disease, for a total of 387 fatalities.[1]


  • Colonel William A. Webb - died on December 24, 1861.
  • Colonel George W. Roberts - killed in action on December 31, 1862.
  • Colonel Nathan H. Walworth - resigned on April 13, 1864.
  • Lieutenant Colonel Edgar D. Swain - mustered out with the regiment.[2]

See also[]

  • List of Illinois Civil War Units
  • Illinois in the American Civil War


  1. The Civil War Archive website after Dyer, Frederick Henry. A Compendium of the War of the Rebellion. 3 vols. New York: Thomas Yoseloff, 1959.
  2. Illinois in the Civil War website after Illinois Adjutant General's muster rolls