Altnau railway station () is a railway station in Altnau, in the Swiss canton of Thurgau. It is an intermediate stop on the Lake line and is served as a request stop by local trains only.
Altnau is served by the S1 of the St. Gallen S-Bahn:
During weekends, the station is served by a nighttime S-Bahn service (SN71), offered by ', and operated by Thurbo for St. Gallen S-Bahn.