Constituency NA-177 (Muzaffargarh-II) () is a constituency for the National Assembly of Pakistan. It comprised mainly areas of Muzaffargarh Tehsil and Kot Addu Tehsil. After the 2018 delimitations, this constituency, along with its neighboring NA-176, were broken up into three constituencies - NA-181, NA-182 (which also includes city of Muzaffargarh from old NA-178), and NA-183.
General elections were held on 10 October 2002. Hina Rabbani Khar of PML-Q won by 46,752 votes.
General elections were held on 18 February 2008. Hina Rabbani Khar of PPP won by 84,916 votes.
General elections were held on 11 May 2013.
Mr. Ghulam Rabbani Khar of PPP won the seat in By-election and became the member of National Assembly.