| Ariffin Omar | |
| Native Name: | عارفين عمر |
| Office3: | Faction represented in Dewan Negara |
| Subterm3: | 2012–2018 |
| Suboffice3: | Democratic Action Party |
| Office2: | Vice-chairman of Democratic Action Party (DAP) |
| Term Start2: | 16 December 2012 |
| Party: | Democratic Action Party (DAP) |
| Otherparty: | Pakatan Harapan (PH) |
| Occupation: | Politician, Lecturer |
| Alma Mater: | University of Science Malaysia (USM) National University of Singapore (NUS) Australia National University (ANU) |
| Birth Place: | Penang, Malaysia |
Ariffin S.M Omar is a Malaysian politician who is a Vice Chairman of the Democratic Action Party (DAP), a component party of Pakatan Harapan (PH) coalition. He served as a senator elected by the Penang State Legislative Assembly in the Parliament of Malaysia from 2 June 2015 to 2 June 2018.
Ariffin Omar studied at St Xavier's Institution, Penang for his secondary school education. He then continued to study at Universiti Sains Malaysia (USM) and later obtained a Bachelor's degree at the National University of Singapore (NUS) and in 1990, obtained a Doctorate degree from the Australia National University (ANU).[1]
He worked as a lecturer in Universiti Sains Malaysia (1974–2006) and a lecturer at the University of Utah (1998) and was also a lecturer in Universiti Utara Malaysia and the National Defence University of Malaysia.[1]
He was also a founding member of Aliran Kesedaran Negara (Aliran), a reform movement dedicated to justice, freedom and solidarity.[1]
Now based at the Penang Institute, his research focuses on nation, nationalism, ethnic relations and religious freedom.[1]