Wahidi Balhaf (Arabic: واحدي بالحاف Wāḥidī Bālḥāf), or the Wahidi Sultanate of Balhaf in Hadhramaut (Arabic: سلطنة الواحدي في بالحافSalṭanat al-Wāḥidī Bālḥāf AlḤaḍramiyah), was one of several Wahidi states in the British Aden Protectorate. It was previously part of the Federation of Arab Emirates of the South, and then of its successor, the Federation of South Arabia when it was known simply as Wahidi.