The Huddersfield trolleybus system once served the market town of Huddersfield, in West Yorkshire, England. Opened on 4 December 1933, it gradually replaced the Huddersfield tramway network, which closed on Saturday, 29 June 1940.
By the standards of the various now-defunct trolleybus systems in the United Kingdom, the Huddersfield system was a medium-sized one, with a total of 15 routes and a maximum fleet of 140 trolleybuses. It was closed on 13 July 1968.
A notable feature of the system was the Longwood trolleybus turntable, which was one of only four such turntables ever to have been constructed in the UK. The turntable was manually operated, and was in use only in 1939–1940 until wartime conditions forced the introduction of other arrangements. However, it remained in situ until demolished in the 1980s.
Three of the former Huddersfield trolleybuses are now preserved, at the Trolleybus Museum at Sandtoft,
A regular service vehicle at the Museum, 619 is privately owned, and in very good condition.