| Maharaja Sadul Singh | |
| Succession: | Maharaja of Bikaner |
| Reign: | 1943–1949 |
| Predecessor: | Ganga Singh |
| Successor: | Karni Singh |
| Birth Date: | 7 September 1902 |
| Death Date: | 25 September 1950 |
| Spouse-Type: | Consort |
| Spouse: | Maharani Sudarshan Prasad Kanwarji Sahiba |
| Issue: | Sushila Kunwariji Karni Singh Amar Singh |
| Father: | Ganga Singh |
| Mother: | Maharani Vallabh Kanwarji |
Lieutenant-General Sir Sadul Singh GCSI, GCIE, KStJ, CVO (7 September 1902 – 25 September 1950) was the last reigning Maharaja of Bikaner from 2 February 1943 to 30 March 1949, continuing as Head of the House of Bikaner and holding the title of Maharaja of Bikaner until his death.[1] [2]
The eldest surviving son of General Sir Ganga Singh, Sir Sadul Singh had, for the thirty years leading up to his succession, been serving in many important posts for his father. He had been a Page of Honour at the coronation of King George V and had attended him at the durbar in Delhi. In 1919, Sir Sadul was present at the Paris Peace Conference and attended the 1924 meeting of the League of Nations. He served as Chief Minister of Bikaner from 1920 to 1925 and fought in the Second World War in Persia, the Middle East and Burma. As the time for Indian independence drew near, Sir Sadul was among the first princes to accede to the Dominion of India, which he did on 7 August 1947. On 30 March 1949, Sir Sadul merged Bikaner into the United State of Greater Rajasthan.
He married in April 1922 Maharani Sudarshan Prasad Kanwarji Sahiba, daughter of Maharaja Venkatraman Ramanuj Prasad Singh Ju Deo of Rewa.
| Sushila Kanwarji | 24 April 1923 | 5 November 1999 | Bhagwat Singh Mewar, Maharana of Udaipur-Mewar |
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| Karni Singh | 21 April 1924 | 4 September 1988 | Maharani Sushila Kanwarji of Dungarpur, daughter of His Highness Rai-i-Rayan Mahimahendra Maharajadhiraj Maharawal Sahib Shri Sir Lakshman Singhji Bahadur of Dungapur. |
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| Amar Singh | 11 December 1925 | 16 June 2007 | Rani Manhar Kunverba |
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He died in London on 25 September 1950 at the age of 48. His eldest son, Karni Singh succeeded him as the Maharaja of Bikaner.