St. Antönien is a Swiss village in the
Prättigau 
and a former municipality in the political district of Prättigau/Davos in the canton of Graubünden.
The municipalities of St. Antönien (242 inhabitants) and
St. Antönien Ascharina 
(118 inhabitants) merged on 1 January 2007 into St. Antönien.