The 25th Arkansas Infantry (1862–1865) was a Confederate Army infantry regiment during the American Civil War. The unit was originally organized as Turnbull's 11th Arkansas Infantry Battalion. Upon being increased by the required number of companies the battalion was organized as the 30th Arkansas Infantry Regiment but was later redesignated as the 25th Arkansas Infantry. There were two regiments officially designated as the 30th Arkansas Infantry. The other "30th Arkansas" served west of the Mississippi River, in the Department of the Trans-Mississippi and was also known as 5th Trans-Mississippi Regiment or the 39th Arkansas or Rogan's Arkansas Cavalry during Price's 1864 Missouri Expedition.