15th 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   15th Regiment, Illinois Infantry

Brief History

The 15th Regiment, Illinois Infantry was organized at Freeport, Illinois, and mustered in May 24, 1861.  It mustered out at Fort Leavenworth, Kansas, September 16, 1865.[1]

The 15th Regiment consolidated with 14th Infantry Regiment on July 1, 1864 to form the "14th and 15th Illinois Veteran Battalion". On April 28, 1865, the battalion was reorganized into a regiment again with new recruits.[2]

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 McHenry County - McHenry County web site

Company B - many men from Boone County - Boone County web site

Company C - many men from Winnebago County - Winnebago County web site

Company D - many men from McHenry County - McHenry County web site

Company E - many men from Jo Daviess County - Jo Daviess County web site

Company F - many men from McHenry County - McHenry County web site
Company G - many men from Stephenson County - Stephenson County web site

Company H - many men from Ogle County - Ogle County web site

Company I - many men from Lake County - Lake County web site

Company K - many men from Carroll County - Carroll County web site

Unassigned Recruits -

15th (Reorganized) Illinois Infantry Regiment -- Illinois Civil War Rosters - scroll to bottom of page for information about counties of origin and rosters..

Other Sources




  1. National Park Service, The Civil War Soldiers and Sailors System (accessed 4 January 2011).
  2. Illinois GenWeb, 15th Illinois Infantry Regiment, (accessed 21 October 2011).