Heidi Tagliavini (born 1950 in Basel) is a Swiss former diplomat noted for her service with international aid and peacekeeping missions; a 2003 profile in the monthly magazine of the Neue Zürcher Zeitung called her "Switzerland's outstanding diplomat". She was charged with leading the European Union investigation into the causes of the 2008 Russo-Georgian war, and represented the OSCE in the 2015 negotiations about the Minsk II agreement concerning the war in Donbass.