| Lyamin | |
| Source1: | Siberian Uvaly |
| Source1 Coordinates: | 62.1411°N 70.3461°W |
| Mouth: | Ob |
| Mouth Coordinates: | 61.2777°N 71.7975°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 281km (175miles) |
| Basin Size: | 15900km2 |
| Pushpin Map: | Russia Khanty-Mansi Autonomous Okrug |
| Pushpin Map Caption: | Mouth location in Khanty-Mansi Autonomous Okrug, Russia |
The Lyamin (Russian: Лямин) is a river in Khanty-Mansi Autonomous Okrug, Russia, a right tributary of the Ob. It is long, and has a drainage basin of .