1st Arkansas Infantry Regiment may refer to: 1st Arkansas Infantry Regiment (Union) 1st Arkansas Infantry Regiment (Confederate) 1st Arkansas 30 Day Volunteer Regiment, a Confederate unit 1st Regiment, Arkansas State Troops, eventually the 15th Arkansas Infantry Regiment 1st Arkansas Colored Infantry Regiment, eventually the 46th United States Colored Infantry Regiment 1st Arkansas Consolidated Infantry Regiment, a Confederate regiment in the Trans-Mississippi theater 1st Arkansas Consolidated Infantry Regiment, a Confederate regiment formed in 1865
See also 1st Arkansas Infantry Battalion, a Union unit 1st Battalion, Arkansas State Troops, a Confederate unit 1st Arkansas Cavalry Regiment (disambiguation) 1st Arkansas Light Artillery 1st Arkansas Field Battery