Evin Prison is a prison located in the Evin neighborhood of Tehran, Iran. The prison has been the primary site for the housing of Iran's political prisoners since 1972, before and after the Iranian Revolution, in a purpose-built wing nicknamed "Evin University" due to the number of students and intellectuals housed there. Evin Prison has been accused of committing "serious human rights abuses" against its political dissidents and critics of the government.

A political prisoner is someone imprisoned for their political activity. The political offense is not always the official reason for the prisoner's detention.