Lalji Singh (5 July 1947 – 10 December 2017) was an Indian scientist. He was best known for his the field of DNA fingerprinting technology in India. He was popularly known as the "Father of Indian DNA fingerprinting". He also worked in the areas of molecular basis of sex determination, wildlife conservation forensics and evolution and migration of humans. In 2004, he received the Padma Shri for his service to Indian science and technology. He was born in Kalwari, Jaunpur, Uttar Pradesh.