An haifi Sonu Nigam a ranar 30 ga Yuli 1973 ga Agam Kumar Nigam da Shobha Nigam, a cikin garin Faridabad, Haryana. Mahaifinsa daga Agra ne kuma mahaifiyarsa daga Garhwal ce. 'Yar'uwarsa Teesha Nigam ita ma ƙwararriyar mawaƙa ce.Nigam ya fara aikinsa na waƙa yana ɗan shekara huɗu, lokacin da ya haɗu da mahaifinsa Agam Kumar Nigam a kan fage don raira waƙar Mohammed Rafi Tera "Kya Hua Wada". Nigam ya fara rakiyar mahaifinsa a kan fitowar mawaƙa a bukukuwan aure da bukukuwa. Ya koma Mumbai tare da mahaifinsa don fara aikinsa na waƙa a Bollywood yana ɗan shekara 18.
18 na shekara