Leong Ngah Ngah (; born 21 October 1955) is a Malaysian politician who has served as a Senator since August 2025. He served as Member of the Pahang State Legislative Assembly (MLA) for Teriang from October 1990 to May 2013 and Tanah Rata from May 2013 to May 2018. He is a member of the Democratic Action Party (DAP), a component party of the Pakatan Harapan (PH) and formerly Pakatan Rakyat (PR), Barisan Alternatif (BA) and Gagasan Rakyat (GR) coalitions. He has also served as the State Advisor of DAP of Pahang since September 2024. He served as the State Chairman of DAP of Pahang for two times until his defeat by a minority of one vote where he was replaced with Tengku Zulpuri Shah Raja Puji in the 2013 Pahang DAP congress and state committee election and again from October 2015 to September 2024. He is also the father of Leong Yu Man, Member of the Pahang State Executive Council (EXCO) and Triang MLA.