1st Louisiana Infantry Regiment may refer to:
1st Louisiana Infantry Regiment (Confederate) 1st Louisiana Infantry Regiment (Union) 1st Louisiana Regulars Infantry Regiment, a Confederate regiment
See also 1st Louisiana Infantry Battalion, a Confederate unit 1st Louisiana Cavalry Regiment (disambiguation) 1st Louisiana Native Guard 1st Louisiana Field Battery, a Confederate unit 1st Louisiana Regular Battery, a Confederate unit 1st Louisiana Colored Light Artillery Battery, a Union unit