John W. Mobberly, also known as John Mobley or Morbly, (C. 1844 – April 5, 1865) was a Confederate guerrilla who operated in the Loudoun Valley and Between the Hills region of Loudoun County, Virginia during the American Civil War. He also served as regular soldier in Elijah V. White's 35th Battalion, Virginia Cavalry, nicknamed the "Comanches." Mobberly is sometimes reported as serving under John Mosby, although this is not grounded in fact. His legacy is surrounded in controversy as Federal soldiers and Union sympathizers in Loudoun County accused him of committing war atrocities, including slave-rustling, while pro-Southern Loudoun residents claimed him to be a hero, second only to Mosby in local popularity.