Top Gear: Vietnam Special is a special 75-minute episode for BBC motoring programme Top Gear, and was first broadcast on 28 December 2008, as part of the final episode for the twelfth series, with the special repeated for UK TV channel Dave, initially in an edited, 46 minute version on 19 January 2009, but later revised to a 90-minute format following complaints by viewers. The special sees hosts, Jeremy Clarkson, Richard Hammond and James May, travelling 1,000 miles (1,600 km) across Vietnam with motorbikes, beginning from Ho Chi Minh City (Saigon), travelling north towards Hạ Long city, and finishing at a floating bar within Hạ Long Bay, a journey that had to be completed within eight days.

Unlike normal episodes of Top Gear, in which the challenges were related to the abilities of the vehicles reviewed, such as the Toyota Hilux in the Polar Special, producer Andy Wilman admitted that "the narrative of the film is a bit more skewed towards the three guys."