The 7th Arkansas Volunteer Infantry (1861−1865) was a Confederate Army infantry regiment during the American Civil War. Organized mainly from companies, including several prewar volunteer militia companies, raised in northeastern Arkansas, the regiment was among the first transferred to Confederate service, and spent virtually the entire war serving east of the Mississippi River. After the unit sustained heavy casualties in the Battle of Shiloh and the Kentucky Campaign, the unit spent most of the rest of the war field consolidated with the 6th Arkansas Infantry Regiment to form the 6th/7th Arkansas Infantry Regiment.

The 13th Arkansas Infantry (1861–1865) was a Confederate Army infantry regiment during the American Civil War. Organized mainly from companies, including several prewar volunteer militia companies, raised in northeastern Arkansas, the regiment was among the first transferred to Confederate Service, and spent virtually the entire war serving in Confederate forces east of the Mississippi River. After the unit sustained heavy casualties during the Battle of Murfreesboro, the unit spent most of the rest of the war field consolidated with the 13th Arkansas Infantry Regiment, to form the 5th/13th Arkansas Infantry Regiment.