The Army of the West was a military force within the Confederate States Army during the American Civil War that the was part of the Trans-Mississippi Department and was composed primarily of members of the old Missouri State Guard.
It saw action in the Battle of Pea Ridge, Battle of Corinth and Battle of Iuka and consisted of about 20,000 men.
The Army was reorganized in late 1862 but the troops that followed Price in his other commands continued to be popularly called the Army of the West. Price's troops were formally reconstituted as the Army of Missouri when they began Price's Raid in an 1864 attempt to recapture Missouri.
- Earl Van Dorn (January–March 1862)
- John P. McCown (March–July 1862)
- Sterling Price (July–September 1862)