General Maharaja Sir Ganga Singh, GCSI, GCIE, GCVO, GBE, KCB, GCStJ (3 October 1880, Bikaner – 2 February 1943, Bombay), was the ruling Maharaja of the princely state of Bikaner (in present-day Rajasthan, India) from 1888 to 1943. He is widely remembered as a modern reformist visionary, and he was also the only "non-White" member of the British Imperial War Cabinet during World War I.
Ganga Singh was born on 3 October 1880, the third and youngest son of Maharaja Lal Singh, and brother to Dungar Singh.
Succeeding his brother on 16 December 1888, he was initially educated privately, then at Mayo College, Ajmer from 1889 to 1894. From 1895 to 1898, he was put under the guidance of Thakur Saheb Lall Singh Ji "Churu" for administrative training, learning administrative work from that of Patwari to that of Prime Minister.