Olga Viktorovna Zavyalova (Russian: О́льга Викторовна Завья́лова), née Korneyeva (born 24 August 1972 in Leningrad) is a Russian cross-country skier who competed from 1993 to 2010.

Zavyalova's best individual finish at the Winter Olympics was seventh in the 7.5 km + 7.5 km double pursuit in Turin in 2006.

She has twelve additional individual victories at distances up to 30 km from 1996 to 2006.

Since her retirement after the 2010 Winter Olympics, Zayalova has been acting as a sports ambassador for the 2014 Winter Olympics in Sochi.

All results are sourced from the International Ski Federation (FIS).