Iryna Prasiantsova
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| Nationality | Belarusian | |||||||||||||||||||||||||||||||||||
| Born | 26 September 1996 | |||||||||||||||||||||||||||||||||||
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| Country | Belarus | |||||||||||||||||||||||||||||||||||
| Sport | Modern pentathlon | |||||||||||||||||||||||||||||||||||
Medal record 
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Iryna Prasiantsova (Belarusian: Ірына Прасянцова; born 29 September 1996) is a Belarusian modern pentathlete.
She participated at the 2018 World Modern Pentathlon Championships, winning a medal. She has qualified to represent Belarus at the 2020 Summer Olympics.