The Lake Zurich Navigation Company (German: Zürichsee-Schifffahrtsgesellschaft, ZSG) is a public Swiss company operating passenger ships and boats on Lake Zurich (Zürichsee) and the river Limmat in Zurich.The company's services connect lake-side towns between Zurich and Rapperswil/Schmerikon, in the cantons of Zurich, Schwyz and St. Gallen, as well as more tourist-oriented river cruises and boat services through the historic centre of the city of Zurich.
It is a member of the Zurich Public Transport Network (Zürcher Verkehrsverbund, ZVV) and transports over 1.5 million passengers every year.