| Lake Guyon | |
| Location: | Canterbury, New Zealand |
| Coords: | -42.2898°N 172.6477°W |
| Pushpin Map: | New Zealand South Island |
| Pushpin Map Alt: | Location of Lake Guyon |
| Basin Countries: | New Zealand |
| Depth: | 24m (79feet) |
Lake Guyon is in the Canterbury region in the South Island of New Zealand. The stream draining the lake feeds into the Waiau Uwha River.[1]
It was within the boundaries of the former St James Station but it is now surrounded by public conservation land. A backcountry hut is on its northern shore. The lake is administered by the Department of Conservation as a scenic reserve.[2]