| Four Mile or Tiropahi River | |
| Pushpin Map: | New Zealand South Island#New Zealand |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Four Mile or Tiropahi River |
| Source1: | Paparoa Range |
| Source1 Coordinates: | -42.0536°N 171.5261°W |
| Mouth: | Tasman Sea |
| Mouth Location: | = |
| Mouth Coordinates: | -41.9558°N 171.4119°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Subdivision Type2: | Region |
| Subdivision Name2: | West Coast |
| Subdivision Type3: | District |
| Subdivision Name3: | Buller |
| Progression: | Four Mile River → Tasman Sea |
| Tributaries Left: | Waggon Creek, Doubtful Creek |
The Four Mile River, also called the Tiropahi River, is a river in the Buller District of New Zealand. It arises in the Paparoa Range and flows north-west skirting the northern boundary of the Paparoa National Park to the Tasman Sea at Needle Point.[1]