The 1st Arkansas Cavalry Regiment was a cavalry regiment of the Confederate States of America. Officially designated by the Arkansas State Military Board as the 6th Regiment Arkansas Cavalry, it was almost never referred to as such during the Civil War. It was usually called Monroe's 1st Arkansas Cavalry, occasionally the 4th Arkansas Cavalry, and more rarely the 1st Trans-Mississippi Cavalry. It is also found in the Official Records of the American Civil War as Fagan's Cavalry and Monroe's Cavalry. The Compiled Service Records of the men are filed under the designation "1st (Monroe's) Cavalry," Rolls 4 and 5.