Sajjan Singh Cheema is a former basketball player from India. He represented India in 1982 Asian Games and other international tournaments and matches including Asian Basketball Championship in 1981, 1983 and 1985. He was honoured with Arjuna award in 1999 and Maharaja Ranjit Singh Award in 1983.
He started playing basketball in 1976 and first participated in Inter university tournament held in Jaipur in 1976. His first played national from Andhra Pradesh and later went on to represent Punjab for more than a decade. He played for India in the FIBA Asia Basketball Championship teams in 1981, 1983, and 1985, and represented the country in the Asian Games in 1982.He retired from playing in 1994. He served as SP with Punjab Police and additionally the Deputy Commissioner of Police (Traffic) Ludhiana.
He joined the Aam Aadmi Party (AAP) in April 2016. The main motive to join AAP was to improve India’s Education and Sports and also to make India a drug free country .
His brothers Balkar Singh and Gurmeet Singh and cousin Kuldeep Singh Cheema also played basketball and represented India. Guneet Kaur the daughter of Sajjan Singh has played in the under-17 category at the national level. His nephew Amritpal singh cheema is international kabbadi player famous with title name know as Shurli khiranwalia 
Being appointed as the Candidate for Aam Aadmi Party from Sultanpur Lodhi Constituency for the Punjab elections of 2017.