Wahidi Bir Ali (Arabic: واحدي بير علي Wāḥidī Bīr ‘Alī), or the Wahidi Sultanate of Bir Ali (Arabic: سلطنة واحدي بير علي Salṭanat al-Wāḥidī Bīr ‘Alī), was one of several Wahidi states in the British Aden Protectorate and the Protectorate of South Arabia.

The last Sultan, Alawi ibn Salih ibn Ahmad Al Wahidi, was deposed and the state was abolished in 1967 upon the founding of the People's Republic of South Yemen.

[1] The predecessor state, the Wahidi Sultanate (Saltanat al-Wahidiyya), was established at an uncertain date.

In 1830 the Wahidi Sultanate split into four states: On 4 May 1881 Ba´l Haf and `Azzan joined.

On 29 Nov 1967 with the independence of the People's Republic of South Yemen all states were abolished.