János Martonyi (born in Kolozsvár, Hungary (today Cluj-Napoca, Romania), 5 April 1944) is a Hungarian politician, who served as Minister of Foreign Affairs from 1998 to 2002 and from 2010 to 2014.

His most prominent tasks were the development of a strong and effective foreign policy, and planning for Hungarian Presidency of the European Union from January to July 2011.

Martonyi's foreign policy's motto was a quote from 17th-century poet Miklós Zrínyi: "Don't hurt the Hungarian!"

Martonyi met Vuk Jeremić who said the Hungarian EU Presidency will be very important for the integration of the Western Balkan countries.

Martonyi noted that number of integration issues has resolved during EU presidency, including EU enlargement, the approval of the Roma Framework Strategy and the Danube Strategy, completion of accession negotiations with Croatia, as well as progress towards the admission of Romania and Bulgaria to the Schengen zone.