The Republican People's Party (Turkish: Cumhuriyet Halk Partisi [dʒumhuːɾiˈjet haɫk 'paɾtisi] , CHP [dʒeːheːpeˑ]) is a Kemalist and social democratic political party in Turkey. It is the oldest political party in Turkey, founded by Mustafa Kemal Atatürk, the first president and founder of the modern Republic of Türkiye. The party is also cited as the founding party of modern Turkey. Its logo consists of the Six Arrows, which represent the foundational principles of Kemalism: republicanism, reformism, laicism, populism, nationalism, and statism. It is currently the second largest party in Grand National Assembly with 139 MPs, behind the ruling conservative Justice and Development Party (AKP).
The political party has its origins in the various resistance groups founded during the Turkish War of Independence, with most members being previously associated with the Committee of Union and Progress. Under the leadership of Mustafa Kemal Atatürk, they united in the 1919 Sivas Congress. In 1923, the "People's Party", soon adding the word "Republican" to its name, declared itself to be a political organisation and announced the establishment of the Turkish Republic, with Atatürk as its first president. As Turkey moved into its authoritarian one-party period, the CHP was the apparatus of implementing far reaching political, cultural, social, and economic reforms in the country.