| Mount Ōmuro | |
| Other Name: | 大室山 |
| Elevation M: | 1588 |
| Elevation Ref: | [1] |
| Location: | Sagamihara, Kanagawa Prefecture Dōshi, Yamanashi Prefecture |
| Coordinates: | 35.5111°N 139.0683°W |
is a mountain at an altitude of 1,588 m on the border between Yamanashi and Kanagawa Prefectures in the northern part of the Tanzawa Mountains.[2] It used to be called "Omureyama". It is counted as one of the 100 famous mountains in Yamanashi, and the Kanagawa side is designated as Tanzawa-Ōyama National Monument.