Mariana Kujur hails from Timna village in Sundergarh district, Odisha. She has two brothers and two sisters and she is the youngest in the family. Both her brothers used to play hockey for relaxation but when Kujur moved to her uncle's house for studies, she joined for hockey under her cousin. She is a product of Panposh Sports Hostel and one of her first coaches who taught her basics when she joined in 2010 was Amulyananda Bihari.