Greek has been spoken in the Balkan peninsula since around the 3rd millennium BC, or possibly earlier. The earliest written evidence is a Linear B clay tablet found in Messenia that dates to between 1450 and 1350 BC, making Greek the world's oldest recorded living language. Among the Indo-European languages, its date of earliest written attestation is matched only by the now-extinct Anatolian languages.

The official language of Greece is Greek, spoken by 99% of the population. In addition, a number of non-official, minority languages and some Greek dialects are spoken as well. The most common foreign languages learned by Greeks are English, German, French and Italian.