| Iryna Prasiantsova | |
| Nationality: | Belarusian |
| Birth Date: | 26 September 1996 |
| Country: | Belarus |
| Sport: | Modern pentathlon |
| Show-Medals: | yes |
Iryna Prasiantsova (be|Ірына Прасянцова; born 29 September 1996) is a Belarusian modern pentathlete.
She participated at the 2018 World Modern Pentathlon Championships, winning a medal.[1] She has qualified to represent Belarus at the 2020 Summer Olympics.[2]