NA-189 Rajanpur-III () is a newly created constituency for the National Assembly of Pakistan. It mainly comprises the Rojhan Tehsil and the town of Kot Mithan. It was created in the 2018 delimitation from the bifurcation of the old NA-175.
General elections were held on 25 July 2018. Sardar Riaz Mehmood Khan Mazari of the PTI became the member from this constituency.
General elections were held on 8 February 2024. Shamsher Ali Mazari won the election with 73,394 votes.