Dato' Raja Kamarul Bahrin Shah bin Raja Ahmad (Jawi: راج قمر البحرين شاه بن راج احمد born 14 January 1955) is a Malaysian politician who served as the Deputy Minister of Housing and Local Government in the Pakatan Harapan (PH) administration under former Prime Minister Mahathir Mohamad and Minister Zuraida Kamaruddin from July 2018 to the collapse of the PH administration in February 2020. He has served as Senator since July 2018. He also served as the Member of Parliament (MP) for Kuala Terengganu from May 2013 to May 2018. He is a member and State Chairman of Terengganu of the National Trust Party (AMANAH) and its coalition PH which is in opposition. He also served as Chairman of the Hotel Association (MAH) and member of the Badan Warisan Malaysia. He is the Chairman of the Non-Governmental Organisations (NGOs) of the Angkatan Amanah Merdeka led by Tengku Razaleigh Hamzah. He was born on 14 January 1955 at Istana Maziah, Kuala Terengganu. He was picked as the party candidate for the Kuala Terengganu federal seat for the 2013 general election on 9 April 2013 and subsequently won. According to various sources, after being inaugurated by Abdul Hadi Awang and the Malaysian Islamic Party Commissioner (PAS) he agreed to join the party over his patriarchal plea. He is popularly known as the architect of the Tengku Tengah Zaharah Mosque or better known as the Floating Mosque, the Terengganu State Museum (Museum recognised as the largest museum in Asia), Istana Melawati (Putrajaya) and several others. Around the 1990s was linked in Malaysia when bringing his son back from Australia with a boat, as well as about the collapse of the roof of the Sultan Mizan Zainal Abidin Stadium designed by his company Senibahri Arkitek. On 21 August 2015, he was declared the chairman of the Terengganu Gerakan Harapan Baru. He said he accepted the offer to lead the Harapan Baru in Terengganu because he believed in the future of the movement.