| 3rd Iowa Infantry Regiment | |
|---|---|
 Iowa flag | |
| Active | June 8, 1861, to November 4, 1864 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Size | 1,099 |
| Engagements | Battle of Shiloh Action at Blue Mills Landing Battle of Hatchie's Bridge Siege of Vicksburg Siege of Jackson Red River Campaign Battle of Kennesaw Mountain Battle of Atlanta |
The 3rd Iowa Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War.