Apostolos Diamantis (; born 20 May 2000) is a Greek professional footballer who plays as a centre-back for Liga I club FC U Craiova.
Career
Diamantis comes from the youth ranks of PAOK. On 24 June 2019, he joined newly promoted side Volos on a season-long loan.
OFI
On 23 August 2020, Diamantis signed a four-year contract with OFI on a free transfer. He made his official debut in a 2–1 away win against Lamia, on 20 September 2020.
At the end of the 2022–23 season it was announced that Diamantis would leave the club upon expiration of his contract, having agreed to join an unnamed european team. In his three seasons with the Cretan based club, he made 79 appearances and scored 3 goals.