Fanø is a Danish island in the North Sea off the coast of southwestern Denmark, and is the very northernmost of the Danish Wadden Sea Islands. Fanø municipality is the municipality (Danish, kommune) that covers the island.
A variety of environments are to be found on Fanø. Not surprisingly, a very common one is sand. The island's whole western shore is made up of beaches, and the sea off the island's northwest end is also home to the "Søren-Jessens-Sand", a vast sandbank. Fanø also has heath and a small pine wood.
Fanø relies heavily on tourism throughout the year and the number of people that arrive in Fanø are ca. 30,000 people every summer. The main attractions are the white sand beaches, the Wadden sea with the migrating birds and the two harbour towns with their maritime history and vernacular architecture consisting of simple thatched houses all oriented west-east.
The main town and the site of its municipal council is the town of Nordby. Other towns include Sønderho, Fanø Vesterhavsbad and Rindby.
It has throughout history been connected to sea travel, but today tourism is its main industry. Tourist attractions are primarily the beaches and the area's nature.