| Personal information | |||
|---|---|---|---|
| Full name | Athanasios Kostanasios | ||
| Date of birth | 11 January 1999 | ||
| Place of birth | Piraeus, Greece | ||
| Height | 1.79 m (5 ft 10 in) | ||
| Position | Attacking midfielder | ||
| Team information | |||
Current team | Panachaiki | ||
| Number | 77 | ||
| Youth career | |||
| Olympiacos | |||
| Senior career* | |||
| Years | Team | Apps | (Gls) |
| 2018–2020 | Olympiacos | 1 | (0) |
| 2020–2022 | Ergotelis | 50 | (7) |
| 2022–2023 | Athens Kallithea | 4 | (1) |
| 2023 | → Egaleo (loan) | 12 | (2) |
| 2023–2024 | Giouchtas | 29 | (2) |
| 2024–2026 | Chania | 28 | (1) |
| 2026– | Panachaiki | 0 | (0) |
| International career‡ | |||
| 2014 | Greece U16 | 1 | (0) |
| 2015–2016 | Greece U17 | 8 | (1) |
| 2017 | Greece U18 | 5 | (2) |
| 2017 | Greece U19 | 9 | (1) |
| 2018 | Greece U20 | 2 | (0) |
|
* Club domestic league appearances and goals as of 18 January 2026 ‡ National team caps and goals as of 11 January 2018 | |||
Athanasios 'Thanasis' Kostanasios (Greek: Αθανάσιος 'Θανάσης' Κωστανάσιος; born 11 January 1999) is a Greek professional footballer who plays as an attacking midfielder for Gamma Ethniki club Panachaiki.
Born in Piraeus, Kostanasios came through the academy of Olympiacos, featuring for the club's Under-19 and Under-20 team and making one first team appearance in a Super League 1 match in May 2018. From Olympiacos, Kostanasios would join Super League 2 side Ergotelis, where he made 51 appearances with seven goals across two seasons.
In July 2022, Kostanasios joined Athens Kallithea FC.
In July 2026, Kostanasios joined Panachaiki.
At international level, Kostanasios earned 26 caps with five goals representing Greece from the Under-16 to Under-20 levels.
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