Sedliště (Polish: Siedliszcze) is a municipality and village in Frýdek-Místek District in the Moravian-Silesian Region of the Czech Republic.

It lies on the border between the Ostrava Basin and the Moravian-Silesian Foothills, in the historical region of Cieszyn Silesia.

The creation of the village was a part of a larger settlement campaign taking place in the late 13th century on the territory of what will be later known as Upper Silesia.

Sedliště was first mentioned in a Latin document of Diocese of Wrocław called Liber fundationis episcopatus Vratislaviensis from around 1305 as Sedlicz.

[2] Politically Sedliště belonged initially to the Duchy of Teschen, ruled by a local branch of Piast dynasty.