| Birth Date: | 25 February 1925 |
| Birth Place: | Tsaritsyn, Russian SFSR, Soviet Union |
| Height: | 165 cm |
| Weight: | 50 kg |
| Sport: | Athletics |
| Event: | Marathon |
| Pb: | 2:23:02 (1957) |
| Club: | Dynamo Volgograd |
| Show-Medals: | yes |
Boris Andreyevich Grishayev (Russian: Борис Андреевич Гришаев, 25 February 1925 - 1999) was a Russian marathon runner. In 1954 he won the Soviet title and placed second at the European Championships. He competed at the 1956 Summer Olympics but failed to finish.