Sergei Vasilyevich Zubatov was a Russian Empire police administrator, best known as the advocate of "police socialism", which included creating legal, police-controlled trade unions.

The Department for the Protection of Public Safety and Order, usually called the Guard Department and commonly abbreviated in modern English sources as the Okhrana was a secret police force of the Russian Empire and part of the police department of the Ministry of Internal Affairs (MVD) in the late 19th century and early 20th century, aided by the Special Corps of Gendarmes.