| Ivan Gryaznov | |
| Birth Date: | 11 January 1891 |
| Birth Place: | Russian Empire |
| Death Place: | Moscow Oblast, Soviet Union |
| Allegiance: | Soviet Union |
| Branch: | Soviet Red Army |
| Rank: | Komkor |
Ivan Kensorinovich Gryaznov (Russian: Иван Кенсоринович Грязнов; 1891 – 29 July 1938) was a Soviet Komkor. He was born in what is now Sverdlovsk Oblast. He was a recipient of the Order of the Red Banner. He was executed during the Great Purge.