Birkholm is a small Danish island off the southern coast of Funen in Ærø Municipality.

[1] The flat, low-lying island is just over 2 km (1 mi) long and 2 metres (6 ft 7 in) above sea level at its highest point, though the protective dykes are 2.8 metres (9 ft 2 in) high.

[2] Birkholm is first mentioned in King Valdemar's census book in 1231.

At the time, the woody, unpopulated island served as a royal hunting ground.

Those still living on Birkholm all the year round appear to have formed their own independent community.