| Start date | Abbr. | Full name | Closing date | Then called | Remarks |
|---|
| 8 January 1889 | ZB | Zürichbergbahn | 1 July 1976 | PBZ | |
| 20 March 1907 | ZBB | Zuger Berg- und Strassenbahn | 30 May 1959 | ZBB' | |
| 30 May 1959 | ZBB' | Zuger Bergbahn und Bus | | | |
| 27 August 1878 | ZGB | Zürichsee-Gotthardbahn | 1 January 1890 | SOB | |
| 22 October 1897 | ZOeS | Zürich-Oerlikon-Seebach | 1 May 1931 | StStZ | |
| 28 December 1980 | ZSB | Zermatt-Sunnegga | | | |
| 5 September 1882 | (ZStG) | Zürcher Strassenbahn Gesellschaft | 1 January 1897 | StStZ | |
| 1 November 1951 | ZVB | Zugerland Verkehrsbetriebe | 22 May 1955 | | Abandoned |
| 16 February 1895 | ZZB | Zentrale Zürichbergbahn Zürich | 1 January 1906 | StStZ | |
| 1 June 1864 | ZZL | Zürich-Zug-Luzern | 1 January 1892 | NOB | |
