Lychen (German pronunciation: [ˈlyːçən]), also known as Flößerstadt (raftsman city), is a town in the Uckermark district, in Brandenburg, Germany.

The timber was built into rafts and used for building projects, and was also used to transport other goods.

Flat-headed thumbtacks were invented in Lychen in 1903 by Johann Kirsten.

At the beginning of the 20th century there were a number of small factories here manufacturing thumbtacks.

The Hohenlychen Sanatorium used by the Schutzstaffel during World War II, is located in the town.