Boseň is a municipality and village in Mladá Boleslav District in the Central Bohemian Region of the Czech Republic.

Most of the municipal territory lies within the Bohemian Paradise Protected Landscape Area.

The first written mention of Boseň is from 1057, when the village was donated to the newly established Litoměřice Chapter.

Since 1994, it is owned by the municipality of Boseň, which made further reconstructions and opened the castle to the public.

[10] A monument to the victims of the Austro-Prussian War in 1866 is located on the top of Mužský hill.