| Mike River | |
| Pushpin Map: | New Zealand Fiordland#New Zealand South Island#New Zealand |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Mike River |
| Source1 Coordinates: | -45.8447°N 166.8804°W |
| Mouth Location: | Fanny Bay |
| Mouth Elevation: | 0m (00feet) |
| Mouth Coordinates: | -45.7746°N 166.8563°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Progression: | Mike River → Fanny Bay → Tamatea / Dusky Sound → Tasman Sea |
The Mike River is a river in Fiordland, New Zealand. It rises near Staircase Saddle and drains a number of small lakes, among them Lake Mike and False Lake, into Dusky Sound at Fanny Bay.