| Kolsvatnet | |
| Pushpin Map: | Agder#Norway |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location of the lake |
| Coordinates: | 59.1607°N 7.2949°W |
| Location: | Valle, Agder |
| Basin Countries: | Norway |
| Area: | 2.72km2 |
| Reference: | NVE |
Kolsvatnet is a lake in the municipality of Valle in Agder county, Norway. It is located about southwest of the village of Valle and about northwest of the village of Rysstad. The lake is located south of the lake Botnsvatnet, east of the mountain Urddalsknuten, and northeast of the lake Rosskreppfjorden. The lake has an area of and sits at an elevation of above sea level.[1]