Mahendra Singh may refer to:
- Mahendra Singh of Patiala (1852–1876), Maharaja of Patiala
- Mahendra Singh Sodha (born 1932), Indian physicist
- Mahendra Singh Tikait (1935–2011), Indian leader of farmers
- Mahendra Pal Singh (born 1940), Indian lawyer
- Mahendra Singh Mewar (born 1941), Indian politician from Udaipur
- Mahendra Singh Pal (born 1949), Indian politician from Uttar Pradesh
- Mahendra Singh (soldier), Indian soldier, recipient of Kirti Chakra and Sena Medal
- Mahendra Singh Dhoni (born 1981), Indian cricketer
- Mahendra Kumar Singh, Indian politician from Uttar Pradesh