I. S. Johar
- Birthday: 16. March 1920
- Birthplace: Tollagannj, British India
- Awards: Filmfare Award for Best Performance in a Comic Role
Inderjeet Singh Johar (Hindi: इंदरजीत सिंह जौहर; 16 March 1920 – 10 March 1984), better known as I. S. Johar (Hindi: आई. एस. जौहर), was an Indian actor, writer, producer and director.
He was born on 16 February 1920, in Talagang, British India. He completed MA degree in Economics and Politics before completing his LLB. In 1947, during the Partition crisis, Johar was visiting Patiala with his family for a wedding, when riots broke out back home in Lahore. He could never go back, and thereafter he worked in Jalandhar for a while, and his family remained in Delhi, before he eventually moved to Bombay, where he made his acting debut with Roop K Shorey's, Ek Thi Ladki (1949).