| Mount Sylvania | |
| Elevation Ft: | 978 |
| Elevation Ref: | [1] |
| Prominence: | 510feet |
| Prominence Ref: | [2] |
| Location: | Multnomah County, Oregon, U.S. |
| Range: | Tualatin Mountains |
| Coordinates: | 45.4382°N -122.7216°W |
| Etymology: | Derived from Silvanus, a Roman tutelary deity[3] |
| Topo: | USGS Lake Oswego |
| Type: | Shield volcano[4] |
| Volcanic Field: | Boring Lava Field |
Mount Sylvania is an extinct volcano, part of the Boring Lava Field, on the outskirts of Portland, Oregon. Parts of the mountain are within the cities of Portland, Lake Oswego, and Tigard.
The Sylvania campus of Portland Community College is located on the mountain's western slopes.