Nijhawan is a surname used by Punjabi Hindus and Sikhs of the Khatri caste. Notable people with the surname, who may or may not be affiliated to the clan, include:
Bal Raj Nijhawan (1915–2014), Indian metallurgist and author Preetish Nijhawan, American entrepreneur Sonia Nijhawan, American astronomer Sumit Nijhawan (born 1978), Indian actor
See also 21710 Nijhawan, minor planet