Goeree-Overflakkee is the southernmost delta island of the province of South Holland, Netherlands. It is separated from Voorne-Putten and Hoeksche Waard by the Haringvliet, from the mainland of North Brabant by the Volkerak, and from Schouwen-Duiveland by Lake Grevelingen.
Since 2013, Goeree-Overflakkee has also been a municipality, consisting from west to east of the former municipalities of Goedereede, Dirksland, Middelharnis, and Oostflakkee. The largest towns are Sommelsdijk, Middelharnis, Ouddorp, and Dirksland.
Despite being part of the province of South Holland, the island's scenery and dialect are more closely related to Zeeland than to Holland.
Wikipedia https://en.wikipedia.org/wiki/Goeree-Overflakkee
Coordinates 51°44'52.334" N 4°7'23.727" E
