Kartar Singh Jhabbar (1874-20 November 1962) was a Sikh leader known for his role in the Gurdwara Reform Movement of the 1920s. Kartar Singh was born to Teja Singh in the Jhabbar village of Sheikhupura District in Punjab (British India). His grandfather Mangal Singh was in the service of Maharaja Ranjit Singh. He received religious education (1906–09) at the Khalsa Updeshak Mahavidyalaya, a training institution for Sikh preachers at Garjakh.