| Ioannis Athanasoulas Γιάννης Αθανασούλας | |
| Position: | Small forward / power forward |
| Height Ft: | 6 |
| Height In: | 7.5 |
| Weight Lbs: | 235 |
| League: | Greek A2 Basket League |
| Team: | Psychiko |
| Number: | 15 |
| Nationality: | Greek |
| Birth Date: | January 21, 1987 |
| Birth Place: | Athens, Greece |
| Career Start: | 2005 |
| Years1: | 2005–2007 |
| Years2: | 2007–2010 |
| Years3: | 2010–2014 |
| Years5: | 2014–2015 |
| Years6: | 2015–2016 |
| Years7: | 2016–2017 |
| Team7: | Lavrio |
| Years8: | 2017–2019 |
| Team8: | Iraklis |
| Years9: | 2019–2020 |
| Team9: | Koroivos Amaliadas |
| Years10: | 2020–2021 |
| Team10: | Panerithraikos |
| Years11: | 2021–present |
| Team11: | Psychiko |
Ioannis Athanasoulas (alternate spellings: Giannis, Yiannis, Yannis, Athanassoulas) (Greek, Modern (1453-);: Γιάννης Αθανασούλας; born January 21, 1987) is a Greek professional basketball player for Psychiko of the Greek A2 Basket League. He is a 2.02 m (6' 7") tall small forward–power forward.
Athanasoulas began his pro career with the Greek 1st Division club AEK Athens in 2005. In 2007, he moved to the Greek club Ilysiakos, which was playing in the Greek 2nd Division at the time. In 2010, he joined the Greek club Panionios and 4 seasons later moved to Panelefsiniakos. In 2015, he moved to Apollon Patras. In 2016, he moved to Lavrio. In 2017, he moved to Iraklis Thessaloniki.[1]
Athanasoulas was a member of the Greek junior national teams. With the junior national teams of Greece, he played at the 2003 FIBA Europe Under-16 Championship, and the 2007 FIBA Europe Under-20 Championship.