Oselce (German: Wosseletz) is a municipality and village in Plzeň-South District in the Plzeň Region of the Czech Republic.

Oselce had the greatest fame at the time of their possession by Viktor Booss-Waldeck in 1887–1916, who was a patron of art and music.

The secondary school offers apprenticeships in blacksmithing, locksmithing, carpentry and vehicle and agricultural machinery repair.

In the basement of the castle chapel, there is a ceiling fresco of St. John of Nepomuk and Czech patrons from the first half of the 18th century.

[11] The parish Church of the Assumption of the Virgin Mary is the landmark of the village of Kotouň.

The church complex is also formed by adjacent cemetery with a Baroque bell tower from 1696.