| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
| Greek A2 Basket League | |
| Season: | 2017–18 |
| Champions: | Peristeri (3rd title) |
| Promoted: | Peristeri Holargos |
| Relegated: | Arkadikos Papagou AEL Doukas |
| Teams: | 16 |
| Dates: | 7 October 2017 – 26 May 2018 |
| Ppg: | 22.8 |
| Ppg N: | GRE |
| Rpg: | 9.8 |
| Rpg N: | GRE |
| Apg: | 9.8 |
| Apg N: | GRE |
The 2017–18 Greek A2 Basket League was the 32nd season of the Greek A2 Basket League, the second-tier level professional club basketball league in Greece. It was the third season with the participation of 16 teams. Playoff and play out games were also held, for a third consecutive season. Peristeri clinched the championship four games before the end of the regular season.[1] Together with the playoffs winners Holargos, they were promoted to the 2018–19 Greek Basket League.
| Club | City | Arena | Capacity | |
|---|---|---|---|---|
| 4,000 | ||||
| Athens (Dafni-Ymittos, Dafni) | Pyrkal Ymittos Indoor Hall | 600 | ||
| 3,500 | ||||
| Tripoli Indoor Hall | 1,000 | |||
| Athens (Marousi) | Dais Gymnasium | 1,200 | ||
| Lefkada Indoor Hall | 1,200 | |||
| Larissa (Agia) | Agias Indoor Sports Arena | 300 | ||
| Athens (Piraeus) | Panagiotis Salpeas Hall | 1,000 | ||
| Athens (Cholargos) | Antonis Tritsis Indoor Hall | 1,665 | ||
| 2,500 | ||||
| Karditsa Municipal Sports Center | 550 | |||
| Dimitris Diamantidis Indoor Hall | 650 | |||
| Athens (Marousi) | 1,700 | |||
| Athens (Papagou) | Saloon Indoor Hall | 800 | ||
| Athens (Peristeri) | 4,000 | |||
| Athens (Psychiko) | Psychiko Indoor Hall | 300 |
In the promotion playoffs, best-of-five playoff series were played. The higher-seeded team hosted the Game 1, Game 2 and Game 5 (if necessary) at home.