| Official Name: | Flodaigh |
| Coordinates: | 58.18°N -6.91°W |
| Location Map: | Scotland Outer Hebrides |
| Caption: | Flodaigh shown within the Outer Hebrides |
| Gridreference: | NB104333 |
| Celtic Name: | Flodaigh |
| Meaning Of Name: | "flat island" |
| Area: | 39 ha[1] |
| Highest Elevation: | 48m (157feet) |
| Population: | Uninhabited |
| Island Group: | Lewis |
| Local Authority: | Western Isles |
Flodaigh is a small island in Loch Roag on the west coast of Lewis in the Outer Hebrides of Scotland. It is about 33ha in extent and the highest point is 48m (157feet). Its name derives from the Old Norse for "flat island".
Inland, the nearest settlement is opposite the hamlet of Cairisiadar. The island was last inhabited in 1827 when it was cleared to make way for a sheep farm.
The small islet of Gousam lies to the north east and the larger islands of Fuaigh Beag and Fuaigh Mòr further east.