The 9th Arkansas Infantry (July 20, 1861 – April 26, 1865) was a Confederate Army infantry regiment during the American Civil War. It served throughout the war in the western theater, seeing action in the Vicksburg, Tennessee and Georgia campaigns. Following its depletion in numbers the regiment was consolidated several times with other Arkansas regiments, finally merging in 1865 into the 1st Arkansas Consolidated Mounted Rifles.