| Hellyer | |
| Name Etymology: | Henry Hellyer, an explorer |
| Map Size: | 280 |
| Pushpin Map: | Australia Tasmania |
| Pushpin Map Size: | 280 |
| Pushpin Map Caption: | Location of the Hellyer River mouth in Tasmania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | Tasmania |
| Subdivision Type3: | Region |
| Subdivision Name3: | North-western Tasmania |
| Length: | 61km (38miles) |
| Mouth: | Arthur River |
| Mouth Coordinates: | -41.2725°N 145.6144°W |
| River System: | Arthur River catchment |
| Tributaries Left: | Fossey River |
| Tributaries Right: | Wey River |
| Extra: | [1] |
The Hellyer River is a perennial river located in north western Tasmania, Australia.
The river flows for before joining into the Arthur River. High quality cool temperate rainforest and tall eucalyptus forest grows along much of the river. Significant species include Myrtle Beech, Leatherwood, Southern Sassafras and Messmate. The river in named in honour of the explorer Henry Hellyer.