38th Regiment or 38th Infantry Regiment may refer to:
Infantry regiments 38th Dogras, a unit of the British Indian Army 38th (1st Staffordshire) Regiment of Foot, a unit of the British Army 38th Infantry Regiment (United States), a unit of the United States Army 38th Infantry Regiment "Neagoe Basarab", a unit of the Royal Romanian Army
Cavalry regiments 38th Regiment Central India Horse, a unit of the British Indian Army 38th Cavalry Regiment, a unit of the United States Army
American Civil War regiments 38th Illinois Infantry Regiment, a unit of the Union (Northern) Army 38th Indiana Infantry Regiment, a unit of the Union (Northern) Army 38th Iowa Infantry Regiment, a unit of the Union (Northern) Army 38th Massachusetts Infantry Regiment, a unit of the Union (Northern) Army 38th Ohio Infantry Regiment, a unit of the Union (Northern) Army 38th Wisconsin Infantry Regiment, a unit of the Union (Northern) Army 38th United States Colored Infantry Regiment, a unit of the Union (Northern) Army 38th Alabama Infantry Regiment, a unit of the Confederate (Southern) Army 38th Tennessee Infantry Regiment, a unit of the Confederate (Southern) Army 38th Virginia Infantry, a unit of the Confederate (Southern) Army
Other regiments 38 (City of Sheffield) Signal Regiment, a unit of the British Army 38th Field Artillery Regiment, a unit of the United States Army 38th Field Regiment, a unit of the New Zealand Army
See also 38th Division (disambiguation) 38th Brigade (disambiguation) 38 Squadron (disambiguation) 38th Wing (disambiguation)