Saint-Géry Island (French: île Saint-Géry) or Sint-Goriks Island (Dutch: ) was the largest island in the Senne (Zenne) river in Brussels, Belgium. It was named after Saint Gaugericus of Cambrai, who built a chapel there around 580; hence the name "Brussels", which comes from Bruocsella or Broekzele, meaning "settlement in the marsh". It ceased to exist as an island when the Senne was covered over in the late 19th century.