The Île d'Ogoz (French pronunciation: [il dɔɡo]; Arpitan: Ila d’Ôgo) is an island in the Lake of Gruyère, located in the canton of Fribourg.

On the island are a ruined castle and a church.

Before the completion of the Rossens Dam, it was a promontory overlooking the valley of the Sarine.

When the level of the lake is at its lowest, the island becomes a 500-metre-long peninsula accessible to pedestrians.

Politically the island belongs to the municipality of Pont-en-Ogoz in the district of Gruyère.