Wilhelm Island (Norwegian: Wilhelmøya) is an island in the Svalbard archipelago. It is situated northeast of Olav V Land on Spitsbergen, in Hinlopen Strait. Its area is 120 km².
About 33.5 % of the island is covered with ice. The island was named after Wilhelm I.
^Nikitenko, B. L., & M. B. Mickey. 2004. Foraminifera and Ostracodes across the Pliensbachian-Toarcian Boundary in the Arctic Realm. In: Alwynne Bowyer Beaudoin & Martin J. Head (eds.), The Palynology and Micropalaeontology of Boundaries, pp. 137–174. London: The Geological Society, p. 153.
^Mills, William James. 2003. Exploring Polar Frontiers: A Historical Encyclopedia. Volume 1: A–L. Santa Barbara, CA: ABC Clio, p. 363.
^Logan, Alan, & L. V. Hills. 1973. The Permian and Triassic Systems and Their Mutual Boundary. Calgary: Canadian Society of Petroleum Geologists, p. 267.
^"Wilhelmøya". The Norwegian Polar Institute. Retrieved 29 May 2012.
Bjørnsundet, a sound between Olav V Land (left) and Wilhelm Island (right)