Funen (Danish: Fyn, pronounced [ˈfyˀn]), is the third-largest island of Denmark, after Zealand and Vendsyssel-Thy, with an area of 3,099.7 square kilometres (1,196.8 sq mi).

Funen is linked to Zealand, Denmark's largest island, by the Great Belt Bridge, which carries both trains and cars.

The Old Little Belt Bridge was constructed in the 1930s, shortly before World War II, for both cars and trains.

This is in contrast to Zealand, where, like in Swedish, a reduction to two genders has taken place, and large parts of Jutland, where, like in English, no such distinction is made.

In 2018, at Munkebo Bakke in northeastern Funen, archaeologists found an exceedingly large Viking hall that dates back to c. 825 – 1,000 CE.