Incumbents
* President – Konstantinos Tsatsos * Prime Minister – Konstantinos KaramanlisEvents
* 20 June – The 6.2 Thessaloniki earthquake affected Central Macedonia with a maximum Mercalli intensity of VIII (''Severe''), causing 45–50 deaths and 100–220 injuries.Births
* 25 June – Virginia Karentzou, artistic gymnastReferences
Years of the 20th century in Greece Greece 1970s in Greece Greece {{Greece-hist-stub