Croatia and Greece established diplomatic relations on July 20, 1992. Since November 1994, Greece has an embassy in Zagreb. Croatia has an embassy in Athens. The relations between Croatia and Greece have been regarded as excellent with a high cooperation between the two countries on the economic, touristic and political aspect. Greece was a key supporter during the accession process of Croatia to the European Union. Both countries are full members of the European Union, NATO and of the Council of Europe.

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.