Greco–Romanian relations are foreign relations between Greece and Romania. Diplomatic relations were established on February 20, 1880, at the legation level, and were raised to embassy level on January 1, 1939. There has been a Greek presence in Romania for at least 27 centuries. At times, as during the Phanariote era, this presence has amounted to hegemony; at other times (including the present), the Greeks have simply been one among the area's many ethnic minorities. Since the fall of communism and the return of democracy in Romania, many Romanians have emigrated to Greece for economic reasons. Both countries are full members of the European Union, the Council of Europe, the NATO and the Organization of the Black Sea Economic Cooperation (BSEC).
The level of Romanian-Greek bilateral relations is considered exceptionally good as Greece has warmly supported and contributed to Romania's entry into NATO and prompt accession into the European Union. Greece was the fifth member state of the EU and first among the old members to ratify the Treaty of Accession of Bulgaria and Romania to the EU. Greece is among the three top investors in Romania, with almost 800 active businesses and invested capital totalling 3 billion euros. According to the General Secretariat for Greeks Abroad, the Greek community in Romania numbers 14,000.