| Portsmouth trolleybus system | |
| Locale: | Portsmouth, Hampshire, England |
| Status: | Closed |
| Routes: | 9 |
| Operator: | Portsmouth Corporation Transport |
| El: | (?) V DC parallel overhead lines |
| Stock: | 100 (maximum) |
The Portsmouth trolleybus system once served the city of Portsmouth, Hampshire, England. Opened on, it gradually replaced the Portsmouth tramway network; the last trams ran on 10 November 1936.
By the standards of the various now-defunct trolleybus systems in the United Kingdom, the Portsmouth system was a medium-sized one, with a total of nine routes, and a maximum fleet of 139 trolleybuses. It was closed on . The former trolleybus routes were replaced by diesel bus services.[1]
Two of the former Portsmouth trolleybuses are now preserved, one (No. 313) at the East Anglia Transport Museum at Carlton Colville, Suffolk, and the other one (No. 1) at the CPPTD Museum, Wicor Farm, and Portchester as of 2014.