Niels Lolk Helveg Petersen (; informally Niels Helveg; 17 January 1939 – 3 June 2017) was a Danish politician. He was Minister of Foreign Affairs from 1993 to 2000, having held the role of Minister for Economic Affairs between 1988 and 1990. He was a Member of Parliament (Folketinget) for the Danish Social Liberal Party from 1966 to 1974, 1977 to 1993, and again from 1994 to 2011.