| Unit Name: | 18th Regiment Kansas Militia Infantry |
| Dates: | October 9, 1864 - October 29, 1864 |
| Country: | United States |
| Allegiance: | Union |
| Branch: | Infantry |
| Battles: | Battle of Little Blue River |
The 18th Kansas Militia Infantry was an infantry regiment that served in the Union Army during the American Civil War.
The 18th Kansas Militia Infantry was called into service on October 9, 1864. It was disbanded on October 29, 1864.
The unit was called into service to defend Kansas against Price's Raid. The regiment saw action at Little Blue, October 21.