Greece–Yugoslavia relations were historical foreign relations between Greece and now split-up Yugoslavia. Relations between Greece and independent South Slavic states developed before the creation of Yugoslavia and played a prominent role during the Balkan Wars. The creation of Yugoslavia was agreed to and made possible after the signing of the Corfu Declaration at the Municipal Theatre of Corfu.

The Balkan Pact of 1953, officially known as the Agreement of Friendship and Cooperation, was a treaty signed by Greece, Turkey and Yugoslavia on 28 February 1953. It was signed in Ankara. The treaty was to act as a deterrence against Soviet expansion in the Balkans and provided for the eventual creation of a joint military staff for the three countries. When the pact was created and signed, Turkey and Greece had been members of the North Atlantic Treaty Organization (NATO) for a year, having both joined on 18 February 1952, while Yugoslavia was a socialist non-aligned state that later became a founding member of the Non-Aligned Movement. The Balkan Pact allowed Yugoslavia to associate itself with NATO indirectly on geopolitical affairs. In October 1954, Israel showed some interest in joining the alliance in expectation that Yugoslavia could mediate in development of the Egypt–Israel relations. However, Israel never ended up joining the alliance.