The Ruse trolleybus system (Bulgarian: Русенски тролейбусен транспорт) forms part of the public transport network of the city and municipality of Ruse, the fifth most populous city in Bulgaria. Opened in 1988, the system currently has seven lines. Its approximate length is 63 km and has been designed to work with 600V DC electricity. Over the years, various models of trolleybuses have been operated in Ruse.