Trolleybus usage by country
As of 2025 there are around 260 cities or metropolitan areas where trolleybuses are operated, and more than 550 additional trolleybus systems have existed in the past. For complete lists of trolleybus systems by location, with dates of opening and (where applicable) closure, see List of trolleybus systems and the related lists indexed there.
Source: Wikipedia — Trolleybus usage by country (CC BY-SA 4.0)