Jai Singh may refer to:
* Jai Singh I (1611–1667), ruler of Amber kingdom in India and a Rajput general of the Mughal Empire, he was also known as Mirza Raja Jai Singh
* Jai Singh of Mewar (1653–1698), ruler of the Mewar kingdom in India
* Jai Singh II (1688–1743), ruler of Amber kingdom in India; also known as Maharaja Sawai Jai Singh
* Jai Singh III (1819–1835), Maharaja of Jaipur State
* Jai Singh Kanheya (1712–1793), the founder and leader of the Kanheya Misl of India
* Jai Singh Prabhakar (1882–1937), Maharaja of Alwar kingdom in India
* Jai Arjun Singh, New Delhi–based freelance writer and journalist
* Jai Pal Singh (1930–1997), Indian physician and educator
* Jai Pratap Singh (born 1953), Indian politician in the Uttar Pradesh Legislative Assembly
* Jai Pal Singh (politician), Indian politician in the Uttar Pradesh Legislative Council
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