| Maharaja Sumer Singh | |
|---|---|
| Maharaja of Jodhpur | |
 Maharaja Sumer Singh | |
| Maharaja of Jodhpur | |
| Tenure | 20 March 1911 – 3 October 1918 |
| Predecessor | Sardar Singh |
| Successor | Umaid Singh |
| Born | 14 January 1898 Mehrangarh Fort Jodhpur Jodhpur State, Rajasthan, India |
| Died | 3 October 1918 (aged 20) Ratanada Palace Jodhpur Jodhpur State |
| Spouse | HH Maharaniji Sa Jadejiji Shri Pratap Kanwarji/Kunwarba of Jamnagar State HH Maharaniji Sa Chauhanji Shri Amar Kanwarji of Sointra in Jodhpur State |
| Issue | Maharajkumariji Baiji Lal Shri Kishor Kanwarji m.to HH Maharajadhiraj Maharaja Sir Sawai Man Singh II of Jaipur State |
| House | Rathore |
| Father | Maharaja Sardar Singh of Jodhpur |
| Mother | HH Maharaniji Sa Hadiji Shri Lakshman Kanwarji Maji Saheba d.of HH Maharao Raja Sir Ram Singh of Bundi State |
| Religion | Hinduism |
Colonel HH Shri Raj Rajeshwar Saramad-e-Raja-e-Hindustan Maharajadhiraja Maharaja Sir Sumair Singh Bahadur,KBE (14 January 1898 – 3 October 1918) was the Maharaja of Jodhpur State of the Rathore dynasty of Marwar from 20 March 1911 to 3 October 1918 the shortest of reign any Jodhpur ruler had.