| Honorific-Prefix: | The Honourable |
| Sean Oppenheimer | |
| Honorific-Suffix: | MP |
| Constituency Mp: | Anetan |
| Parliament: | Nauruan |
| Term Start: | 9 July 2016 |
| Term End: | 27 August 2019 |
| Birth Date: | 7 October 1967 |
| Birth Place: | Melbourne, Australia |
| Nationality: | Nauruan |
| Party: | Independent |
Sean Oppenheimer (born 7 October 1967) is a Nauruan politician and businessman who was a Member of Parliament for Anetan from 9 July 2016 to 27 August 2019. He was a member of the Opposition. Oppenheimer is the owner of the retail store Capelle & Partner.
Oppenheimer was elected in the July 2016 elections to the Parliament of Nauru, representing the constituency of Anetan.[1] He was not invited to form part of the government and so joined Riddel Akua and Kieren Keke as a default member of the 3 member opposition. He served in a number of official capacities over the years:
He did not run for reelection in 2019.[2]
Oppenheimer runs the largest private business in Nauru, Capelle & Partner, which has more than 150 employees.[3] It was founded by Oppenheimer's parents in 1965. It has several different business lines including the largest retail store in the country with supermarket and hardware provisions as well as accommodation, car rental and boat chartering services.
Sean Oppenheimer is married and has 5 children.[1] As a child he attended Yaren Primary School, Aiwo Primary School, Nauru High School and Caulfield Grammar School in Melbourne.[1]
His father, Desmond Oppenheimer, was born in Ireland and migrated to Australia as a child.[4] His mother, Sophie Oppenheimer, is a native Nauruan. Oppenheimer's maternal granduncle, Hammer DeRoburt was the first president of Nauru when the country became independent in 1968.[4]