Mufti Shahabuddin Popalzai (Pashto: مفتي شهاب‌الدین پوپلزی‎) is an Islamic cleric, Imam, Khatib and head of the regional moon-sighting committee at the historic Qasim Ali Khan Mosque, Peshawar, Khyber Pakhtunkhwa, Pakistan. The committee, whose existence predates the creation of Pakistan, traditionally declares the sighting of the Ramadan and Shawwal moons, resulting in the fasting and Eid in certain regions of Khyber Pakthunkhwa including Peshawar, although most of the rest of Pakistan follows the central Ruet-e-Hilal Committee.