Tongyang or Tong Yang may refer to:
- Tongyang Group, South Korean conglomerate
- Tongyang Confectionery, former name of Orion Confectionery, South Korean company formerly owned by the Tongyang Group
- Tongyang Daegu Orions, former name of Goyang Orions, South Korean basketball team formerly owned by the Tongyang Group
- Tongyang Broadcasting Company, South Korean television station owned by Samsung founder Lee Byung-chul
- Tongyang Cup, international Go competition
- Tong Yang Moolsan, South Korean tractor manufacturer
- Tongyang, Hubei (通羊镇), town in and the seat of Tongshan County, Hubei, China
- Tongyang, Jiangsu (潼阳镇), town in Shuyang County, Jiangsu, China
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