| Honorific-Prefix: | His Excellency |
| Eduardus Sangsun | |
| Bishop Of: | Bishop of Ruteng |
| Enthroned: | March 25, 1985 |
| Ended: | October 13, 2008 |
| Predecessor: | Vitalis Djebarus |
| Successor: | Hubertus Leteng |
| Birth Date: | 14 June 1943 |
| Birth Place: |  Karot, Manggarai district, Flores, Indonesia |
| Death Place: | Jakarta, Indonesia |
| Nationality: | Indonesian |
Eduardus Sangsun (June 14, 1943 – October 13, 2008) was the Indonesian third bishop of the Roman Catholic Diocese of Ruteng from 1984 until his death in 2008.[1] The Diocese of Ruteng is based in the city of Ruteng on the western part of Flores island.
Sangsun was born in Karot, Manggarai district, Flores, in the present-day nation of Indonesia on June 14, 1943.[1] He was ordained a Roman Catholic priest on July 12, 1972.[1] Pope John Paul II appointed Sangsun as only the third bishop of Ruteng in 1984. Sangsun was formally ordained to bishop on March 25, 1985.[1] He would remain bishop for over two decades.
Sangsun learned he had heart disease in April 2008 when he travelled to Singapore for a medical checkup.[1] He flew to Rome and the Vatican in September 2008 to take part in the vow-taking ceremony of Dominican nuns.[1] He was hospitalized while in Rome. Italian doctors advised Sangsun to have heart surgery while in Italy.[1] Sangsun declined saying he would rather undergo the procedure in Indonesia.[1]
Sangsun arrived in Jakarta, Indonesia, on October 8, 2008, and was hospitalized on October 10.[1] He died at the Pantai Indah Kapuk Hospital in North Jakarta of a heart attack on October 13, 2008, at the age of 65.[1]
Bishop Sangsun's body was taken to St. Carolus Hospital, a Catholic hospital in Central Jakarta, for public viewing.[1] A requiem mass for Sangsun was held at the Assumption Cathedral in Central Jakarta.[1]
Sangsun's body was then flown to Ruteng, Flores, for his funeral.[1] His funeral and burial took place at the Assumption Cathedral compound in Ruteng, Flores.[1]