| Office: | Prime Minister of Tonga |
| Order: | 5th |
| Predecessor: | Siosateki Veikune |
| Successor: | Sione Tupou Mateialona |
| Termend: | January 1905 |
| Termstart: | January 1905 |
| Spouse: | ʻElisiva Fusipala Taukiʻonetuku |
| Children: | George Tupou II |
Siaosi Tuʻipelehake (born Siaosi Fatafehi Toutaitokotaha) was a politician from Tonga who briefly served as Prime Minister of Tonga in January 1905.[1] [2] Tu'ipelehake is a traditional very high-ranking Tongan title. He was the 4th Tu'ipelehake.
He was the father of George Tupou II and a grandson of George Tupou I.