| Irini Vasiliou | |
| Nationality: | Greek |
| Birth Date: | 18 March 1990 |
| Birth Place: | Heraklion, Greece |
| Height: | 1.69 m |
| Weight: | 58 kg |
| Country: | Greece |
| Sport: | Track and field |
| Event: | 400 metres 200 metres |
| Pb: | 400 m: 51.75 s (2019) 400 m (i): 52.76 s (2021) 200 m: 23.31 s (2019) 200 m (i): 23.51 s (2021)[1] |
Irini Vasiliou (Greek, Modern (1453-);: Εἰρήνη Βασιλείου; born 18 March 1990) is a Greek sprinter.[2] She competed in the 400 metres at the 2016 European Athletics Championships.[3] At the 2016 Summer Olympics and the 2020 Summer Olympics she competed in the 400 metres.[4]
Her twin sister Anna is also a 400 metres athlete.[5]
| 2016 | European Championships | Amsterdam, Netherlands | 14th (sf) | 400 m | 52.58 | |
| 10th (sf) | 4×400 m relay | 3:31.66 SB | ||||
| Rio de Janeiro | 54th (h) | 400 m | 54.37 | |||
| 2017 | World Championships | London, United Kingdom | 23rd (sf) | 400 m | 53.27 | |
| 2018 | Mediterranean Games | Tarragona, Spain | 7th | 400 m | 53.20 | |
| European Championships | Berlin, Germany | 26th (h) | 400 m | 53.37 | ||
| 13th (h) | 4×400 m relay | 3:34.69 | ||||
| 2019 | European Indoor Championships | Glasgow, United Kingdom | 26th (h) | 400 m | 53.66 | |
| World Championships | Doha, Qatar | 36th (h) | 400 m | 52.31 | ||
| 2021 | European Indoor Championships | Torun, Poland | 16th (sf) | 400 m | 53.31 | |
| Olympic Games | Tokyo, Japan | 35th (h) | 400 m | 53.16 | ||
| 2022 | World Indoor Championships | Belgrade, Serbia | 25th (h) | 400 m | 53.62 | |
| 2023 | European Indoor Championships | Istanbul, Turkey | 19th (h) | 400 m | 53.71 |