| Möhlinbach | |
| Mouth Location: | High Rhine (German: Hochrhein) |
| Mouth Coordinates: | 47.5804°N 7.8378°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Switzerland |
| Length: | 15 km |
| Source1 Coordinates: | 47.486°N 7.9044°W |
| Basin Size: | 37.3 km |
The Möhlinbach is a long river in the Rheinfelden District of the canton of Aargau, Switzerland. It is a left tributary of the High Rhine. Its mouth is located north of Möhlin.