| Unit Name: | 89th Illinois Infantry Regiment |
| Dates: | August 27, 1862 – June 24, 1865 |
| Country: |  United States |
| Allegiance: | Union |
| Branch: | Infantry |
| Size: | Regiment |
| Nickname: | Railroad Regiment |
| Motto: | Clear the Tracks |
| Battles: | American Civil War |
| Disbanded: | June 24, 1865 |
| Commander1: | John Christopher |
| Commander1 Label: | Colonel |
| Commander2: | Charles Truman Hotchkiss |
| Commander2 Label: | Colonel |
The 89th Illinois Infantry Regiment, nicknamed the Railroad Regiment, was an infantry regiment that served from August 27, 1862, to June 24, 1865 in the Union Army during the American Civil War.
The 89th Illinois Infantry was organized at Chicago, Illinois and mustered into federal service on August 27, 1862. The regiment was nicknamed the "Railroad Regiment" due to the important role Chicago-based railroad companies had in raising and filing the regiment's roster. The regiment's motto, "Clear the Tracks" was stitched onto the national flag.[1]
It participated in the battles of Stones River, Liberty Gap, Chickamauga, Orchard Knob and Missionary Ridge, Pickett's Mill, the Atlanta Campaign, and Nashville. Its brigade commander for most of the American Civil War was August Willich- regimental commander for most of the war was Charles Truman Hotchkiss. Major John M. Farquhar- then sergeant major- was awarded the Medal of Honor for heroic service at the Battle of Stones River. The regiment was mustered out on June 10, 1865, and discharged at Chicago on June 24, 1865.
12 officers and 121 enlisted men were killed in action or died of their wounds, and 1 officer and 172 enlisted men died of disease, for a total of 306 fatalities.[2]