| 83rd Regiment Illinois Volunteer Infantry | |
|---|---|
 Illinois flag | |
| Active | August 21, 1862, to July 5, 1865 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Engagements | American Civil War |
The 83rd Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.