Daulat Singh
| King Daulat Singh I | |
|---|---|
| King of Idar | |
| Reign | May 1911 - 14 April 1931 | 
| Predecessor | King Pratap Singh I | 
| Successor | King Himmat Singh I | 
| Born | Prince Daulat Singh of Marwar 12 May 1875 Jodhpur, Kingdom of Marwar | 
| Died | 14 April 1931 (aged 55) Taj Mahal Hotel, Mumbai | 
| Father | Prince Bhupal Singh of Marwar | 
| Military career | |
| Battles / wars | Tirah campaign Boxer Rebellion First World War | 
Daulat Singh I, KCSI (12 May 1875 – 14 April 1931), was a Maharaja of the Kingdom of Idar from 1911 to 1931.
He served as a squadron commander with the Jodhpur Risala in the Tirah Campaign 1897–1898, and Boxer Rebellion in China 1900. Later, he served also in First World War as a Major in British Army from 1914 in the Great War in Egypt and the Middle East 1914-1918 and was promoted to Hon. Lieut-Col in 1918.
Daulat Singh was the son of Prince Bhupal Singh of Marwar, himself a son of King Takht Singh I and was adopted by his paternal half-uncle, King Pratap Singh I of Idar, who abdicated in his favour in 1911. He was appointed as a Knight Commander of the Order of the Star of India (KCSI) in the 1920 New Year Honours.
Daulat Singh I was succeeded by his eldest son, Himmat Singh.