Koena Mitra was born on January 7th, in Calcutta. Mitra is of Bengali origin. Her father is a Business man and a Chartered Accountant and her mother is a teacher & interior designer. Mitra also has a younger sister.

Koena Mitra attended South Point High School in Calcutta. She went to college at Lady Brabourne College in Calcutta. Mitra was trained with the Mamata Shankar ballet troupe for 12 years. She was a super model and has walked the ramp in places like Milan, Paris, New York etc.