Local elections were held in Greece on 8 October 2023 and, where a second round was required, on 15 October 2023. Voters elected representatives to the country's local authorities, comprising 13 regions and 332 municipalities.

Ecologist PASOK – KINAL-backed (and SYRIZA-endorsed in the runoff) Haris Doukas defeated the incumbent center-right ND mayor of Athens Kostas Bakoyannis, in a runoff in the 2023 Athens Municipal Elections.

Thessaloniki ND-backed mayor Konstantinos Zervas was defeated in a landslide victory by independent challenger Stelios Aggeloudis, also in a runoff, with Aggeloudis receiving 67% of the vote to Zervas' 32%.

In Piraeus and in Patras, both incumbent mayors, centrist Ioannis Moralis and communist Kostas Peletidis were re-elected.

In Attica, ND-backed Nikos Chardalias, former deputy defense and former deputy citizen protection minister won in a landslide on the first round.

In Central Greece, incumbent ND-backed Fanis Spanos defeated the main Independent SYRIZA-backed candidate Apostolos Gletsos, 48% to 25%, and secured his second consecutive term.

In Central Macedonia, incumbent ND-backed Apostolos Tzitzikostas defeated the other candidates in a landslide, with the second one in line having a 59-point gap, thus securing his third full term.

In Crete, incumbent Stavros Arnaoutakis, backed by PASOK – KINAL and ND, secured his fourth consecutive term, making him the longest serving Governor in the country of Greece, along with Alexandros Kachrimanis.