Periyar (E. V. Ramasamy, 1879–1973) was an Indian social reformer.
Periyar or Periyaar may also refer to:
Places Periyar River, in Kerala, India Periyar district, now Erode district, in Tamil Nadu, India Periyar National Park, in Kerala, India Mullaperiyar Dam, a dam in Idukki district, Kerala, India Vandiperiyar, a village in Idukki district, Kerala, India
People Periyar Dasan (1949–2013), actor from Tamil Nadu, India
Organisations Periyar Maniammai University, in Thanjavur, Tamil Nadu, India Periyar University, in Salem, Tamil Nadu, India
Media Periyar (1973 film), an Indian Malayalam-language film Periyar (2007 film), an Indian Tamil-language film about the social reformer
See also Periyar Dravidar Kazhagam, a former political party in Tamil Nadu, India