| Piagailoe | |
| Local Name: | --> |
| Nickname: | --> |
| Map: | Federated States of Micronesia |
| Map Mark: | Cercle rouge 100%.svg |
| Map Mark Width: | 20 |
| Map Width: | 300 |
| Label: | Piagailoe |
| Label Position: | right |
| Coordinates: | 8.0833°N 146.7333°W |
| Area M2: | or |
| Area Ha: | --> |
| Length Km: | 7 |
| Width Km: | 3.5 |
| Coastline M: | --> |
| Country: | Federated States of Micronesia |
| Country Admin Divisions Title: | State |
| Country Admin Divisions: | Yap |
| Country Admin Divisions Title 1: | Municipality |
| Country Admin Divisions 1: | Satawal |
| Country Area M2: | or |
| Country Area Ha: | --> |
| Country 1 Area M2: | or |
| Country 1 Area Ha: | --> |
| Population: | 0 |
Piagailoe Atoll is an uninhabited atoll in the State of Yap in the Federated States of Micronesia, geographically part of the Caroline Islands. It is located 71 kilometers northeast of Lamotrek, 71 kilometers northwest of Satawal and 945 kilometers southeast of Yap island. This atoll lies at the western end of a chain of submarine mountains that extend westwards of the Gray Feather Bank for about 180 km. The Condor Reef, Pikelot and the Oraitilipu Bank belong to this underwater feature as well.[1] In order to distinguish this atoll from Fayu (East Fayu) Atoll in Chuuk State, located about 500 km to the east, this atoll is also known as West Fayu.
The atoll is roughly 7 km long and 3.5 km wide in its widest area. The 5.6 km2 lagoon[2] has a passage into it located in the southwestern fringe of the reef. Its maximum depth is 38 m.[3]
There is only one island on the reef, West Fayu Island, with a surface of 6 ha. It is located at the NE end of the reef.
Administratively it belongs to Satawal municipality,[4] which is also one of the legislative districts of Yap State.[5] [6]