Maharaja Ranjit Singh of Punjab (1780–1839) was the founder of the Sikh Empire.

Ranjit Singh may also refer to:

• Ranjit Singh of Bharatpur (1745–1805), Jat ruler of the Bharatpur princely state in Rajasthan, India
• Ranjit Singh (cricketer) or Ranjitsinhji (1872–1933), ruler of the Indian princely state of Nawanagar from 1907 to 1933 and cricketer
• Ranjit Singh (cricketer, born 1994), Indian cricketer
• Ranjit Singh (athlete) (born 1957), Indian Olympic athlete
• Ranjit Singh (volleyball), Indian volleyball player
• Ranjit Singh (How I Met Your Mother character)
• Ranj Singh, British doctor and TV presenter
• Ranjit Singh Lobo, fictional character portrayed by Danny Denzongpa in the 1981 Indian film Bulundi
• Thakur Ranjit Singh, fictional character in the 1973 Indian film Dhund, played by Denzongpa

• Ranjit Singh Dyal (1928–2012), Indian Army officer and administrator
• Ranjit Singh Boparan (born 1966), British businessman

• All pages with titles containing Ranjit Singh
• The Lion of Punjab (disambiguation), an epithet of the emperor
• K. S. Ranjitsinhji (1872–1933), cricketer and Maharaja Jam Sahib of Nawanagar
• Maharaja Ranjit Singh (TV series), Indian TV series about the Sikh emperor
• Sher-e-Punjab: Maharaja Ranjit Singh, another Indian TV series about the emperor