| Onyang | |
| Native Name: | 온양읍 |
| Native Name Lang: | ko |
| Settlement Type: | Eup (administrative division) |
| Pushpin Map: | South Korea Ulsan |
| Pushpin Label Position: | none |
| Pushpin Map Caption: | Location within Ulsan |
| Coordinates: | 35.419°N 129.2807°W |
| Subdivision Type: | Country |
| Unit Pref: | Metric |
| Area Total Km2: | 63.94 |
| Population Total: | 24748 |
| Population As Of: | 2012 |
| Population Density Km2: | auto |
| Hangul: | 온양읍 |
| Rr: | Onyang-eup |
| Mr: | Onyang-ŭp |
Onyang is an administrative division of Ulju County, Ulsan, South Korea. It is located south of Ulsan city center, east of the Busan-Ulsan expressway.[1]
Onyang is divided into 10 sub-divisions, or villages, called ri. These include: