Kunwar Natwar Singh, popularly known as K. Natwar Singh is an Indian politician and former cabinet minister. On November 7, 2005, he was removed from his post as Minister in charge of External Affairs under a cloud of scandal and became a minister without portfolio. Named by the U.N. Independent Enquiry Committee as a beneficiary of illegal payoffs in Iraqi oil scam, he was forced to resign from the Cabinet on December 6, 2005.

He is married to the daughter of Yadavindra Singh, the Maharaja of Patiala, and is hence brother-in-law to Captain Amarinder Singh, a former chief minister of Punjab.