Zillis-Reischen (Romansh: Ziràn-Reschen) is a municipality in the Viamala Region in the Swiss canton of Graubünden.

Zillis-Reischen was created in 1875 with the union of the previously independent municipalities of Reischen and Zillis.

[5] The municipality site was certainly inhabited even earlier, as a Roman settlement and graves from the 6th or 7th century indicate.

A treasure trove of 10th Century coins that were found near the village indicate that there was trade over the Viamala pass by this time.

This gift did not include the church's property, four large farms in Schams and Rheinwald.

In 1473 the Viamala road over the Alps opened, which increased traffic on the Splügen and San Bernardino passes.

Of the rest of the land, 1.8% is settled (buildings or roads) and the remainder (22.9%) is non-productive (rivers, glaciers or mountains).

[6] Before 2017, the municipality was located in the Schams sub-district, of the Hinterrhein district, after 2017 it was part of the Viamala Region.