| Tan Tjong Sian | |
| Nationality: | Indonesian |
| Sport: | Sailing |
| Birth Date: | 26 April 1931 |
| Birth Place: | Yogyakarta, Dutch East Indies |
Tan Tjong Sian (born 26 April 1931) is an Indonesian sailor. He competed in the Flying Dutchman event at the 1968 Summer Olympics.[1]