| Unit Name: | 25th Regiment Indiana Volunteer Infantry |
| Dates: | August 19, 1861, to July 17, 1865 |
| Country: | United States |
| Allegiance: | Union |
| Branch: | Infantry |
| Battles: | Battle of Fort Donelson Battle of Shiloh Siege of Corinth Battle of Hatchie's Bridge Atlanta Campaign Battle of Jonesboro Battle of Bentonville |
The 25th Indiana Volunteer Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War.
The regiment lost 7 officers and 81 enlisted men killed in action or died of wounds and 3 officers and 270 enlisted men who died of disease, for a total of 361 fatalities.