Walter Barshai (born 1955) is a Russian author, scientist and humanitarian, and the founder of the Tairus  Research and Production facility within the Russian Academy of Sciences in Novosibirsk, Russia.
Barshai was born in Moscow, Russia, a son of a famed musician, Rudolf Barshai and painter, Anna Martinson, daughter of a famed Russian Comic Sergey Martinson, but emigrated to the West in 1972. He is a theoretical physicist and the author of a work on the implications of the uncertainty principle on the spontaneous growth of hydrothermal crystals  He was the recipient of an honorary award from Russian Academy of Sciences for his contribution to the Russian Science (2005). He is also a classical music producer, recordings including Mahler 5th Symphony with JDP,"Richter: last Orchestra performance", Brahms, "Zeltser plays Rachmaninoff", Lokshin and a publisher ("Selected Art Works of Anna Martinson", poetry, etc.).