Terrorist groups - home based:
Revolutionary People's Liberation Party/Front (DHKP/C): aim(s): install a Marxist-Leninist government in Turkey area(s) of operation: headquartered in Turkey, where the group has assassinated numerous Turkish businessmen, security officers, judiciary personnel, and attacked US personnel and facilities in Turkey over the years; has revived its attacks, primarily in Istanbul, against Turkish Government elements in recent years; launched rocket attacks on police and government buildings in Istanbul as recently as 21 January 2017; known for employing youths sympathetic to the group's cause to participate in violent riots; participates in terrorist acts with other armed groups, such as in August 2015, when a female member and a female from another group shot at the US Consulate in Istanbul, resulting in no fatalities; DHKP/C's central leadership directs the group's affairs in Turkey and abroad; senior leaders' whereabouts are unknown; numerous senior leaders and operatives have been arrested in recent years; assessed to have several dozen members operating in Turkey; outlawed in Turkey

Terrorist groups - foreign based:
Islamic State of Iraq and the Levant (ISIL): aim(s): replace the Turkish Government with an Islamic state and implement ISIL's strict interpretation of Sharia area(s) of operation: launches rocket attacks into southern Turkey from northern Syria; moves fighters and supplies across the Turkey-Syria border; responsible for suicide bombings and gunfire attacks on 28 June 2016 at Ataturk Aiport in Istanbul, killing 44 locals and foreigners and injuring at least 240; suicide bombers killed 102 people at a peace rally in Ankara on 10 October 2015, marking the deadliest attack in modern Turkish history; actively recruits fighters
Kurdistan Workers Party (PKK) (Kongra-Gel): aim(s): establish Kurdistan, which includes land in eastern and southeastern Turkey area(s) of operation: PKK attacks have surged since 2016 in the southeast and spilled over to the country's western cities; targets primarily tourist locations and government, military, and security personnel and facilities; in October 2016, the Turkish Government reported thousands of PKK fighters had been killed and over 600 Turkish security force members had lost their lives and Human Rights groups reported hundreds of civilian deaths since the conflict between the Turkish Government and PKK resumed in July 2015, following a 2-1/2-year ceasefire; outlawed in Turkey