Raja Muhammad Zafar-ul-Haq (Urdu: ???? ???????; born 18 November 1935), is a Pakistan Senator from the Punjab, serving since being elected on 12 March 2009.
He is the current leader of the opposition in Senate.
He is currently serving as the Chairman of the Pakistan Muslim League (N), a centre-right but conservative party, since 20 February 2000.
A retired diplomat and lawyer by profession, Zafar-ul-Haq has served as the Minister of Religious Affairs in second administration of Prime Minister Nawaz Sharif from 1997 until being removed in 1999.
Haq is known for his views for support of the religious conservatism but strongly advocated for the religious temperance and Humility.In addition, he is also known for leading the constitutional initiatives to form the inquiry commission on kargil debacle to be investigated by the Supreme Court of Pakistan against Pervez Musharraf whom he saw the latter as "traitor", and voiced support for the civilian control of the military.