Worfin Island is a large island with a number of associated smaller islands, most of which don't have names. Worfin Island is the site of Worfin Village, Ogre Vale, Ogre Hill and the Elf Maiden Mere. The Radnarian Isles and other small islands are just off the coast of Worfin Island and the water is shallow enough that it is possible for people to wade out to them.

Worfin Island is mostly barren, but the fishing there is said to be good and its inhabitants tend to be fishermen. The interior of the island is said to be the haunt of roving packs of wolves and lone ogres. Dragons have sometimes been seen there.

The name of Worfin Island is believed to be derived from an earlier name "Dwarven Island", or even "Dwarven Mountain" which may have become an island when most of the known world sank into the sea during the Great Cataclysm. But the identification of Worfin Island with Dwarven Mountain is disputed. The main argument is that Dwarven Mountain is portrayed on ancient maps as being much further north of Port Town than Worfin Island is. Nonetheless, it has even been suggested that the dwarves of Worfin Island are partly descended from the inhabitants of Dwarven Mountain and that they know secret entrances to enormous underground caverns far below the surface of the island, sealed in the days of the Great Cataclysm and never flooded. It is said these caverns contain ancient treasures and magic preserved from the days of the Elder Gods.

The dwarves of Worfin Village are the earliest known inhabitants other than wild ogres, but there is a statue of what appears to be an elf at Elf Maiden Mere on Worfin Island and this statue is known to be older than Worfin Village.