| Sergey Grigoriants | |
|---|---|
 Grigoriants in 2008 | |
| Country | Russia (until 2022) Hungary (since 2022) |
| Born | 2 November 1983 Tashkent, Uzbek Soviet Socialist Republic, USSR |
| Title | Grandmaster (2003) |
| FIDE rating | 2531 (November 2024) |
| Peak rating | 2606 (August 2015) |
Sergey Mikhailovich Grigoriants (Russian: Сергей Михайлович Григорьянц; born 2 November 1983) is a Russian chess grandmaster who represents Hungary.