The Democratic Party of Iranian Kurdistan (PDKI; Kurdish: حیزبی دێموکراتی کوردستانی ئێران, romanized: Hizbi Dêmukrati Kurdıstani Êran, HDKI; Persian: حزب دموکرات کردستان ایران, romanized: Ḥezb-e Demokrāt-e Kordestān-e Īrān), also known as the Kurdish Democratic Party of Iran (KDPI), is an armed leftist separatist movement of Kurds, exiled in northern Iraq with branch offices in Europe.

[35] The PDKI reorganised itself, marginalising its pro-KDP leader Abdullah Ishaqi (also known as Ehmed Tewfiq), adding new Communist and nationalist members, and forming the Revolutionary Committee to continue the struggle against the Iranian regime.

[32][34][35] After reforms by a new leader, Abdurreman Qasımlo, the PDKI fought alongside Islamic and Marxist movements against the Shah, culminating in the 1979 Iranian Revolution.

On 17 September 1992, PDKI leaders Sadegh Sharafkandi, Fettah Abduli, Humayûn Erdelan and their translator Nûri Dêkurdi were assassinated at the Mykonos Greek restaurant in Berlin, Germany.

[40] In the Mykonos trial, the courts found Kazem Darabi, an Iranian national who worked as a grocer in Berlin, and Lebanese Abbas Rhayel, guilty of murder and sentenced them to life in prison.

[42] On 13 July 1989, the then PDKI leader Abdurreman Qasımlo arrived in Vienna with his delegation to have talks with Iranian diplomats regarding the terms of reconciliation between the central government in Tehran and the Kurds.

After they entered the conference hall and the talks started, the Iranian "diplomats" took out automatic weapons and murdered all of the members of the Kurdish delegation, including Abdurrahman Qasımlo.

On the 8th September 2018 the Islamic Revolutionary Guard Corps Aerospace Force launched seven Fateh-110 missiles at the Democrat Castle in Koya while a KDP meeting was underway.

The missiles got a direct hit on where the meeting was taking place at the Democrat Castle killing a total of 18 KDP and KDPI members.

On November 14, Iranian airstrikes on the Democrat Castle operating in Iraqi Kurdistan continued, killing at least two people and injuring 10 other KDPI members.

[44] During the 20th Congress of the Socialist International, held at the headquarters of the United Nations in New York City (9–11 September 1996), the PDKI was given the status of observer member.