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. He also remained as the Education minister of Sindh.^[1]

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

Pir Mazhar ul Haq was first elected as a member of the Provincial Assembly of Sindh in general elections of 1988 from Constituency PS-74 (Dadu-IV)^[1] as a candidate of Pakistan Peoples Party. 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. He was continuously elected in all the general elections except general elections of 2002. 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.^[6]