| Thayer Glacier | |
| Type: | Mountain glacier |
| Location: | Cascade Range, Deschutes County, Oregon, U.S. |
| Map: | USA Oregon |
| Label Position: | right |
| Map Size: | 225 |
| Coordinates: | 44.1636°N -121.7639°W |
| Coordinates Ref: | [1] |
| Length: | 1200feet |
| Terminus: | Glacial Lake |
| Status: | Retreating |
Thayer Glacier is in the U.S. state of Oregon. The glacier is situated in the Cascade Range at an elevation of over . It is on the east slopes of North Sister, an extinct shield volcano.[2]
In August 2020 the Oregon Glaciers Institute reported that Thayer Glacier no longer has active, moving ice.[3]