Hima Das was born at Kandhulimari village, near the town of Dhing in her home state of Assam to Ronjit Das and Jonali Das.[8] Her parents are farmers by profession. She is the youngest of five siblings.[11] She completed early education from Dhing Public High School. She used to play football and had always wanted to pursue a career in football. However, she did not see any prospects for herself in the women's football in India.
At one of the inter-school camps held at the nearby Jawahar Navodaya Vidyalaya (JNV), she would arrive at the ground before practise began, and sometimes even before the gates were opened. A physical education teacher at the Vidyalaya was impressed by her determination and punctuality. He later convinced her to pursue a career in sprinting.[12]
At the 2018 Asian Games, Das qualified for the 400 m final, after clocking 51.00 in heat 1 and setting a new Indian national record.[17] On 26 August 2018 she improved the national record to 50.79 s in the 400 m final however she could win only the silver medal.[18] Later on 30 August 2018, she, along with M. R. Poovamma, Sarita Gayakwad and V. K. Vismaya won the women's 4 × 400 metres relay clocking 3:28.72. Hima also won a gold medal in the 4 × 400 m mixed relay, which was held for the first time at Asian Games.[19]
Das continued her success in 2019 winning the 200m gold in Poznan Grand Prix in Poland, on 2 July 2019, with a time of 23.65 seconds.[20][21]
On 13 July, she won the 200m at the Kladno Meet in the Czech Republic with a time of 23.43 seconds.[22][23]
On 20 July 2019, she achieved her third win in a month, and fifth win, in the 400-meters in Nové Město, Czech Republic in a time of 52.09 seconds.[24]
She was named for the World Championships to be held at Doha in October 2019. However a month before, she was ruled out of participation due to a back problem, that had started right after she competed at the Asian games the previous year.[25]
