Machang Bubuk is a state constituency in Penang, Malaysia, that has been represented in the Penang State Legislative Assembly. The state constituency was first contested in 1974 and is mandated to return a single Assemblyman to the Penang State Legislative Assembly under the first-past-the-post voting system. Since 2013, the State Assemblyman for Machang Bubuk is Lee Khai Loon from the Parti Keadilan Rakyat (PKR), which is part of the state's ruling coalition, Pakatan Harapan (PH).