Pir Ilahi Bux or Pir Ilahi Buksh (Sindhi: پير الاهي بخش; Urdu: پیر الٰہی بخش) was a Pakistani politician and activist who was a prominent member of the Pakistan Movement and served as the Chief Minister of Sindh from 1948 to 1949.

Bux was born at Pir Jo Goth near Bhansyedabad on 9 July 1890 in a spiritual family of Dadu District, Sindh, Pakistan.

On the suppression of the Khilafat Movement by the British Government, Pir Sahib was advised by Late Sir Shah Nawaz Bhutto, the then President, District Local Board, Larkana to go back to Aligarh for completing his studies.

Pir Sahib acceded to the advice of Sir Shah Nawaz Bhutto and proceeded to Aligarh Muslim University from where he did his M.A.

Pir Ilahi Bux having been deeply inspired by Quaid-e-Azam Muhammad Ali Jinnah, soon joined the Muslim League and became one of his most trusted Lieutenants.

Quaid-e-Azam was deeply moved by this act of Pir Illahi Bux and personally donated Rs.

His grandson Advocate Pir Mazhar Ul Haq succeeded him in politics and remained member of the Provincial Assembly of Sindh and remained Minister of Housing and Town Planning, Law and Parliamentary Affairs and Education in Sindh in the PPP Govts of 1988, 1993 and 2008 respectively.

Pir Mazhar Ul Haq is considered one of the most loyal members of the Pakistan Peoples Party and has recently served as the Senior Minister of Sindh Province holding the portfolios of Education, Literacy and Criminal Prosecution Service.

His great-grandson Barrister Pir Mujeeb Ul Haq is an office bearer of the Pakistan Peoples Party in Dadu District and has his own law practice by the name of P.I.B.