| Official Name: | Yashima |
| Settlement Type: | District of Takamatsu City |
| Pushpin Map: | Japan |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Shikoku |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Kagawa Prefecture |
| Subdivision Type3: | City |
| Subdivision Name3: | Takamatsu |
| Area Total Km2: | 10.44 |
| Population Total: | 21,115 |
| Population Density Km2: | 2,022.51 |
| Timezone: | JST |
| Utc Offset: | +9 |
| Coordinates: | 34.3437°N 134.1013°W |
is a district of Takamatsu, Kagawa, Japan. At the summit, an observation deck can be found overlooking the Seto Inland Sea and the city of Takamatsu. The mountain is also noted for Yashima-ji, the 84th temple of the Shikoku 88 temple pilgrimage.
Yashima was also a decisive battleground in the Genpei War (1180–1185) between the Taira and Minamoto clans.