The Swiss rail network is noteworthy for its density, its coordination between services, its integration with other modes of transport, timeliness and a thriving domestic and trans-alp freight system. This is made necessary by strong regulations on truck transport, and is enabled by properly coordinated intermodal logistics.

In 2015, with 5,323 kilometres (3,308 mi) network length, Switzerland has not only the world's most dense railway network (128.9 km/10³km², except for very small countries and city-states) despite the Alps covering about 60% of its surface, but it is also a world leader in kilometres traveled: 2,459 km (1,528 mi) per inhabitant and year (2015). Virtually 100% of its network is electrified, except for the few tracks on which steam locomotives operate for tourism purposes only. There are 74 railway companies in Switzerland. The share of commuters who travel to work using public transport (as main mode of transport) is 30%. The share of rail in goods transport performance by road and rail (modal split) is 39%.

Switzerland is a member of the International Union of Railways (UIC). The UIC Country Code for Switzerland is 85.

Three quarters of the Swiss rail network is at standard gauge, comprising 3,773 km (2,344.4 mi), administered mostly by three companies. Important railway stations are the Zürich HB (441,400 passengers per day on a working day), Bern (202,600 ppd), Basel SBB (112,900 ppd), Lausanne (107,100 ppd), Winterthur (105,200 ppd), Luzern (91,800 ppd), Zürich Oerlikon (84,500 ppd), Zürich Stadelhofen (81,100 ppd), Olten (78,100 ppd), and Geneva (70,700 ppd).

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