Kataja

Template: Infobox Island / Maintenance / image missing template: Infobox Island / Maintenance / height missing

Kataja is a small uninhabited island (0.71 km ²) located in the Gulf of Bothnia, about 15 km from the mouth of the Torne River in Haparanda and Tornio. Remarkably, the island is because it is divided between Sweden and Finland (see also: List of divided islands). Two landmarks and a myelin sheath mark the boundary, which also represents the easternmost tip of Sweden here. Most of the island belongs to Sweden.

As 1809, the border between Sweden and Russia ( which Finland had conquered from Sweden) was drawn, it was still in the water between Kataja and the even smaller island Finnish Inakari. However, the land rose gradually created a connection between the two islands and thus a land border.