20th Regiment, Illinois Infantry

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United States   Gotoarrow.png   U.S. Military   Gotoarrow.png   Illinois   Gotoarrow.png   Illinois Military   Gotoarrow.png   Illinois in the Civil War   Gotoarrow.png   20th Regiment, Illinois Infantry

Brief History

The 20th Regiment, Illinois Infantry was organized at Joliet, Illinois, and mustered in June 13, 1861. It mustered out July 16 and discharged at Chicago, Illinois, July 24, 1865.[1]


Companies in this Regiment with County of Origin

Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.

The following counties of origin are taken from the Adjutant General's Report, found on the Illinois Civil War Rosters web site. Roster pages are from the same report found on the Internet Archives web site. The rosters show the men who served in each regiment, their residences, dates of enlistment and mustering out, and other remarks.

  • Company A - many men from Champaign County - Champaign County web site -
  • New Company A - many men from Will County - Will County web site -
  • Company B - many men from Will County - Will County web site -
  • Company C - many men from McLean County - McLean County web site -
  • Company D - many men from Livingston County - Livingston County web site -
  • Company E - many men from DeWitt County - DeWitt County web site -
  • Company F - many men from Will County - Will County web site -
  • Company G - many men from Kankakee County - Kankakee County web site -
  • Company H - many men from LaSalle and Putnam counties - LaSalle and Putnam county web sites -
  • Company I - many men from Iroquois County - Iroquois County web site -
  • Company K - many men from Kendall and Will counties - Kendall and Will county web sites -
  • Unassigned Recruits -

Other Sources


  • Illinois State Archives - Illinois Civil War Muster and Descriptive Rolls Database (accessed 14 June 2011). Search by residence, unit, regiment, company or soldier.



  1. National Park Service, The Civil War Soldiers and Sailors System (accessed 4 January 2011).