| Maínis | |
| Map: | island of Ireland |
| Location: | Atlantic Ocean |
| Coordinates: | 53.3002°N -9.8763°W |
| Country: | Ireland |
| Country Admin Divisions Title: | Province |
| Country Admin Divisions: | Connacht |
| Country Admin Divisions Title 1: | County |
| Country Admin Divisions 1: | Galway |
| Population: | 127 |
| Population As Of: | 2022 |
| Population Footnotes: | [1] |
Maínis or Mweenish[2] is an island off the Connemara coast in the heart of the Conamara Gaeltacht. The island is close to Carna and linked to the mainland by a bridge. It is noted for its isolation and rugged beauty.