Idrsko (pronounced [ˈiːdəɾskɔ]) is a settlement on the right bank of the Soča River in the Municipality of Kobarid in the Littoral region of Slovenia.

The northern limits of Idrsko are bounded by Mlinšček Creek to the northwest and Idrija Creek, a right tributary of the Soča River, to the northeast.

Two more right tributaries of the Soča River flow south of Idrsko: Potočec Creek (a.k.a.

The local church is dedicated to Saint Thomas and was built in 1765.

This article about the Municipality of Kobarid in Slovenia is a stub.