Igor O. Girka (born April 29, 1962) is a Ukrainian physicist and specialist in plasma physics.

He is the dean of the School of Physics and Technology of Kharkiv National University (since 2005), a Corresponding Member of the National Academy of Sciences of Ukraine (since 2018), and a laureate of the K. D. Sinelnikov prize of the National Academy of Sciences of Ukraine (2010).

Girka graduated from Kharkiv University in 1985, where he has been working ever since.

[1] Girka studied the effect of plasma corrugation and helical inhomogeneity on natural frequencies and natural modes of magnetohydrodynamic waves, as well as on Alfven plasma heating.

He also explained the increase in Alfven heating in the case of a maximum on the radial density profile compared with the case of the linear profile.