Thalwil is a railway station in the municipality of Thalwil in the Swiss Canton of Zürich.
The station is located on the Lake Zurich left bank (Zurich to Chur) main line and Zurich to Lucerne main line railways. To the Zurich side of the station, the Zimmerberg Base Tunnel diverges from the original lakeside line, whilst on the Lucerne side is the junction point where the Zurich to Chur and Zurich to Lucerne lines diverge. Thus all trains on both lines must pass through the station, which is served by trains on lines S2, S8, S21 and S24 of the Zürich S-Bahn, and by various long distance and international trains.[1]