Pasha D. Lychnikoff (born February 16, 1967) is a Russian theater, film, and television actor living and working in the United States.

Born in Moscow, where he later received formal education at the Russian Academy of Theatre Arts (also known as GITIS from 1934 to 1991), he moved to the United States in the early 1990s. After moving to Los Angeles, he appeared in many television productions and feature films. He is known for his roles in Deadwood and The Big Bang Theory, as well as in Trade. Lychnikoff has also performed on stage several times in Russia and the United States.