Ivan Petrov

• Ivan Petrov (ataman), Cossack ataman, Russian explorer of China and Mongolia
• Ivan Atanassov Petrov, Bulgarian neurologist
• , Soviet NKVD officer, chief of GUPVI
• Ivan Fyodorovich Petrov, Soviet Air Force general, head of the Central Aerohydrodynamic Institute and Flight Research Institute, first rector of the Moscow Institute of Physics and Technology
• Ivan Georgiev Petrov, Bulgarian-American physicist, past president of American Vacuum Society
• Ivan Petrov (army general), Soviet army general
• Ivan Ivanovich Petrov, Russian bass singer