Daulat Singh (12 May 1875 – 14 April 1931) was the Maharaja of Idar from 1911 to 1931. He served as a squadron commander with the 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 succeeded by his eldest son, Himmat Singh.