A mineral wagon or coal truck is a small two axle railway vehicle used in the United Kingdom and elsewhere to carry coal and other mine products. They were originally made of wood and often of very simple construction, with no train brakes, but from the 1930s on were more commonly made of riveted or welded steel.

Mineral wagons were phased out in the UK in the 1960s, following reduction in demand for household coal and the development of merry-go-round trains, which use much larger hopper wagons.