Periyar may refer to
- Periyar (river), a major river in Kerala
- Periyar district, the erstwhile name for Erode district in Tamil Nadu
- Periyar National Park
- Periyar E. V. Ramasamy, a Tamil social reformer
- Periyar (film), a 2006 film on the life of the social reformer
- Periyar University, a university named after the social reformer
- Periyar Maniammai University
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