The Plovdiv trolleybus system (Bulgarian: Пловдивски тролейбусен транспорт) was a part of the public transport network of the city and municipality of Plovdiv, the second most populous city in Bulgaria.

Opened in December 1955, the system had waxed and waned in size over time.

In October 2012, because the operator is a private company, the city lost the opportunity to acquire 65 mln lv EU funding for purchasing approximately 100 brand-new trolleybuses.

The system was officially closed on 1 October 2012 although some trolleybuses continued operation for a few more weeks.

Currently there is no trolleybus movement and the municipality has issued an order for dismantling the overhead network.