21st Illinois Infantry Regiment

21st Regiment Illinois Volunteer Infantry
ActiveJune 28, 1861–December 16, 1865
CountryUnited States
AllegianceUnion
BranchInfantry
Engagements
Commanders
Notable
commanders
Ulysses S. Grant

The 21st Regiment Illinois Volunteer Infantry was a volunteer infantry regiment that served in the Union Army during the American Civil War.