| 18th Iowa Infantry Regiment | |
|---|---|
 Iowa state flag | |
| Active | August 6, 1862, to July 21, 1865 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Equipment | .68 cal. Austrian Rifles |
The 18th Iowa Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War.