Röthis is a municipality in the district of Feldkirch, in the Austrian state of Vorarlberg. It lies in the westernmost part of Austria, in the Rhine valley near the border with Switzerland.
It is one of several small communities in the Feldkirch district, a region centred on the city of Feldkirch. Like much of Vorarlberg, the area is characterised by Alpine terrain and a network of neighbouring villages rather than a single large urban centre.