| Kaukuanjärvi | |
| Location: | Posio |
| Coords: | 65.9333°N 46°W |
| Pushpin Map: | Finland Lapland |
| Catchment: | Iijoki |
| Basin Countries: | Finland |
| Area: | 13.02km2 |
| Depth: | 2.62m (08.6feet) |
| Max-Depth: | 14m (46feet) |
| Volume: | 0.0344km3 |
| Shore: | 33.47km (20.8miles) |
| Elevation: | 223.4m (732.9feet) |
| Frozen: | November–May |
Kaukuanjärvi is a medium-sized lake in the Iijoki main catchment area. It is located in Posio municipality, in the Lapland region in Finland.[1]