| 25th Regiment Illinois Volunteer Infantry | |
|---|---|
 Illinois state flag | |
| Active | August 4, 1861, to September 5, 1864 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Engagements | American Civil War |
The 25th Regiment, Illinois Volunteer Infantry, was an infantry regiment that served in the Union Army during the American Civil War.
- ^ Report of the Adjutant General of the State of Illinois, vol. 2 (Springfield, Illinois: Phillips Bros., State Printers, 1900), pp. 352-53.