The Rotherham trolleybus system once served the town of Rotherham, West Riding of Yorkshire, England. Opened on 3 October 1912, it was the fourth trolleybus system to be established in the United Kingdom, after the systems in nearby Bradford and Leeds, which had opened simultaneously in 1911, and Dundee earlier in 1912. Between 1912 and 1949, the Rotherham system gradually replaced the Rotherham Tramway.