Flodday near Vatersay should not be confused with Flodday, Sound of Barra.
| Gridreference: | NL612924 |
| Official Name: | Flodday |
| Coordinates: | 56.9°N -7.57°W |
| Location Map: | Scotland Outer Hebrides |
| Caption: | Flodday shown within the Outer Hebrides |
| Celtic Name: | Flodaigh |
| Norse Name: | floti |
| Meaning Of Name: | 'raft' or 'float' island |
| Area: | 23ha[1] |
| Highest Elevation: | 430NaN0 |
| Population: | 0 |
| Island Group: | Uists and Barra |
| Local Authority: | Na h-Eileanan Siar |
Flodday (Gaelic; Scottish Gaelic: Flodaigh) is an uninhabited island, south west of Barra in the Western Islands of Scotland.
Flodday is one of the Barra Isles, lying 1miles west of Sandray. It consists of three parts, with a natural rock arch between the larger two. Facing west there are black cliffs.
The island has a small grey seal colony and is home to a subspecies of the dark green fritillary butterfly (Argynnis aglaja scotica).