2009 Iran poll protests trial refers to a series of trials conducted after 2009 Iranian presidential election. Over 140 defendants, including prominent politicians, academics and writers, were put on trial for participating in the 2009 Iranian election protests. The defendants were accused of orchestrating "colour revolution" in Iran, and "exposing cases of violations of human rights." The trials were widely condemned by world leaders both in Iran and worldwide as a "show trial" with coerced confessions.

Presidential elections were held in Iran on 12 June 2009, with incumbent Mahmoud Ahmadinejad running against three challengers. The next morning the Islamic Republic News Agency, Iran's news agency, announced that with two-thirds of the votes counted, Ahmadinejad had won the election with 62% of the votes cast, and that Mir-Hossein Mousavi had received 34% of the votes cast. There were large irregularities in the results and people were surprised by them, which resulted in protests of millions of Iranians, across every Iranian city and around the world and the emergence of the opposition Iranian Green Movement.