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| Sisavang Vatthana | |
|---|---|
| Rey De Laos | |
 Sisavang Vatthana on 3 November 1959, shortly after his accession upon the death of his father on 29 October | |
| King of Laos | |
| Reign | 29 October 1959 – 2 December 1975 |
| Predecessor | Sisavang Vong |
| Successor | Monarchy abolished; Prince Souphanouvong as president |
| Prime Ministers | |
| Born | 13 November 1907 Luang Phrabang, French Laos |
| Died | 13 May 1978 (aged 70) Sam Neua, Laos |
| Spouse | Queen Khamphoui |
| Issue | Crown Prince Vong Savang Princess Savivanh Savang Princess Thala Savang Prince Sisavang Savang Prince Sauryavong Savang |
| House | Khun Lo Dynasty |
| Father | Sisavang Vong |
| Mother | Kham-Oun I |
| Religion | Theravada Buddhism |
| Prime Minister of Laos | |
| In office 15 October 1951 – 21 November 1951 | |
| Monarch | Sisavang Vong |
| Preceded by | Phoui Sananikone |
| Succeeded by | Souvanna Phouma |
| Signature |  |
Sisavang Vatthana (Lao: ພຣະບາທສົມເດັຈພຣະເຈົ້າມະຫາຊີວິຕສີສວ່າງວັດທະນາ) or sometimes Savang Vatthana (full title: Samdach Brhat Chao Mavattaha Sri Vitha Lan Xang Hom Khao Phra Rajanachakra Lao Phengdara Parama Sidha Khattiya Suriya Varman Brhat Maha Sri Savangsa Vadhana; 13 November 1907 – 13 May 1978) was the last king of the Kingdom of Laos and the 6th prime minister of Laos serving from 29 October to 21 November 1951. He ruled from 1959 after his father's death until his forced abdication in 1975. His rule ended with the takeover by the Pathet Lao in 1975, after which he and his family were sent to a re-education camp by the new government.[citation needed]