| Salehuddin Malay: {{Script|Arab|صالح الدين | |
| Sultan of Selangor | |
| Succession1: | 1st Sultan of Selangor |
| Reign1: | 1766–1782[1] |
| Predecessor1: | Position Established |
| Successor1: | Ibrahim Shah |
| Succession2: | Yang Di-Pertuan Besar of Selangor |
| Reign2: | 1743–1766 |
| Succession3: | Personal Details |
| Full Name: | Raja Lumu bin Almarhum Opu Daeng Chelak |
| Regnal Name: | Sultan Salehuddin Shah Ibni Almarhum Yamtuan Muda Riau II Opu Daeng Chelak |
| Posthumous Name: | Marhum Saleh |
| Spouse: | Engku Puan binti Paduka Sri Sultan Alauddin Ri'ayat Shah of Riau |
| Issue: | Raja Ibrahim Shah Raja Nala Raja Punuh Raja Perak Raja Sharifah |
| Royal House: | Royal Buginese Luwu Opu Daeng Chelak originating from South Sulawesi |
| Father: | Yamtuan Muda Riau II Opu Daeng Chelak bin Almarhum Opu Daeng Rilaga |
| Mother: | Encik Tomita[2] |
| Birth Date: | 1705 |
| Death Date: | 1782 (aged 76–77) |
| Burial Place: | Royal Cemetery, Bukit Melawati, Kuala Selangor |
| Religion: | Sunni Islam |
Sultan Salehuddin Shah ibni Almarhum Yamtuan Muda Riau II Opu Daeng Chelak (Jawi: سلطان صالح الدين شاه ابن المرحوم يمتوان مودا رياو ٢ اوڤو داءيڠ چلق; born Raja Lumu bin Opu Daeng Chelak, 1705–1782) was the first Sultan of Selangor.[3] He was the son of the Bugis warrior prince Opu Daeng Chelak. He took on the title of Sultan Sallehuddin of Selangor in 1766. The Bugis had already begun to settle on the west coast of the Malayan Peninsula towards the end of the 17th century.
Salehuddin was born as Raja Lumu, the second eldest son of the Bugis warrior, Daeng Chelak and his first wife, Encik Tomita. Raja Lumu took the title of the first Raja of Selangor in 1743 and held it until he then became the first Sultan of Selangor in 1766.[4]
Following Raja Lumu, two other Bugis chiefs settled in the Selangor area: Raja Tua in Klang and Daeng Kemboja in Linggi, south of Lukut. Raja Lumu originally met with opposition from the sultans of Perak and Johor, as well as from the Dutch, but eventually managed to consolidate his sovereignty. By 1770, his legitimacy was strengthened by marriage to the niece of the Sultan of Perak in November 1766.[5]
By 1766, the newly crowned sultan used the name 'Selangor' as his Sultanate since the site of court administration was situated along the basin of the Selangor River.
The latter, Sultan Muhammad "invested Salehuddin with the insignia of Malay royalty and also attended the subsequent installation ceremony in Selangor". To this alliance, he soon added another, by marrying his daughter to the Sultan Abdullah Mukarram Shah of Kedah, the ruler of the most northerly of the western Malay sultanates.
1) Engku Puan binti of Paduka Sri Sultan 'Ala ud-din Ri'ayat Shah bin Daeng Rilaga
2) A daughter of prince of Perak