| Darlington trolleybus system | |
| Locale: | Darlington, County Durham, England |
| Status: | Closed |
| Routes: | 5 |
| Operator: | Darlington Corporation Transport |
| Stock: | 66 (maximum) |
The Darlington trolleybus system once served the town of Darlington, County Durham, England. Opened on, it replaced the Darlington Corporation Light Railways tramway network.
By the standards of the various now-defunct trolleybus systems in the United Kingdom, the Darlington system was a moderately sized one, with a total of 5 routes, and a maximum fleet of 66 trolleybuses. It was closed relatively early, on .
None of the former Darlington trolleybuses are recorded as having been preserved.