The 39th Arkansas Infantry Regiment or Cocke's Arkansas Infantry Regiment (also known as "Johnson's regiment," "Hawthorn's regiment," "Cocke's regiment," or "Polk's regiment") was an infantry formation of the Confederate States Army during the American Civil War, and was successively commanded by Colonels Albert W. Johnson, Alexander T. Hawthorn, John B. Cocke, and Lieutenant-Colonel Cadwallader Polk.