Rimjhim Sinha (born c. 1995) is a young feminist sociologist, activist, and changemaker from Kolkata, West Bengal, widely recognized for her fearless stand on gender justice, women's rights, and community empowerment. She came into the public eye following her leadership in the “Reclaim the Night” movement, which emerged after a controversial incident involving a medical student at R.G. Kar Medical College. Under her guidance, the movement saw thousands take to the streets in torchlight marches, sit-ins, and rallies-demanding safer public spaces and institutional accountability.