The Cambodian People's Party (CPP; Khmer: គណបក្សប្រជាជនកម្ពុជា, romanized: Keanapak Pracheachon Kampuchea [keanapaʔ prɑciəcɔn kampuciə]) is a political party in Cambodia which has ruled the country since 1979. Founded in 1951, it was originally known as the Kampuchean People's Revolutionary Party (KPRP).
During the Cold War it allied itself with Vietnam and the Soviet Union, in contrast to the pro-Chinese Communist Party of Kampuchea led by Pol Pot. After toppling the Khmer Rouge's Democratic Kampuchea regime with the Vietnamese-backed liberation of Phnom Penh, it became the ruling party of the People's Republic of Kampuchea (1979–1989), which was later renamed the State of Cambodia (1989–1991). The party's current name was adopted during the final year of the State of Cambodia, when the party abandoned the one-party system and Marxism–Leninism.