| Rolfsån | |
| Map: | Map of the river Rolfsån – UK – Карта річки Рольфсон.GIF |
| Subdivision Type1: | Country |
| Subdivision Name1: | Sweden |
| Subdivision Type3: | County |
| Basin Size: | 693.7km2[1] |
Rolfsån is a river in Sweden, the main outflow of lake Lygnern. It empties out into the Kungsbacka Fjord.