Pir Mazhar Ul Haq (Urdu: پیر مظہر الحق) born 14 September 1947 is a Pakistani politician who remained a member of the Provincial Assembly of Sindh from 1988 to 2013.

[1] He was born 14 September 1949 to Pir Shahnawaz[1] He did BA and MA in Political science from University of Sindh.

Pir Mazhar Ul Haq remained as a minister for housing and town planning, and law and parliamentary affairs respectively.

[2] He was the Parliamentary leader of Pakistan Peoples Party in Sindh Assembly,[2] a member of the Central Executive Committee of the Pakistan Peoples Party[3] and the Senior Minister[4] in the Sindh Provincial Government, holding the portfolios of Education and Literacy[5] and Criminal Prosecution Service.

His daughter Marvi Mazhar contested general election from Constituency PS-74 (Dadu-IV) in 2002 and became successful as member of the Provincial Assembly of Sindh.