3rd Arkansas Infantry Regiment may refer to:
3rd Arkansas Infantry Regiment (Confederate) 3rd Arkansas Infantry Regiment (Union), a Union regiment that failed to complete organization 3rd Arkansas Colored Infantry Regiment, a Union regiment 3rd Arkansas Consolidated Infantry Regiment, a Confederate regiment 3rd Regiment, Arkansas State Troops, a unit of the Provisional Army of Arkansas
See also 3rd Arkansas Cavalry Regiment (disambiguation) 3rd Arkansas Field Battery 3rd Arkansas Light Artillery