Yuri Petrovich Raizer (Russian: Юрий Петрович Райзер, 26 January 1927 – 25 June 2021) was a prominent Soviet and Russian theoretical physicist.

He was Senior Research Fellow at the Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences, Moscow, Russia where he served as a head of the Division of Physics of gas dynamic processes since 1965.

Additionally, he was professor at the Moscow Institute of Physics and Technology since 1968.

Raizer worked in various fields including gas dynamics, low-temperature plasma, explosion physics, gas discharge physics, the interaction of laser radiation with ionized gas, and the physics of lightning.

His "Physics of Shock Waves and High-Temperature Hydrodynamic Phenomena", co-authored with Yakov Zeldovich (in English, 1968, 2002), and "Gas Discharge Physics" (in English, 1991, 1997) are well known handbooks for researchers and students.