The Voisin C12 was an automobile made between 1926 and 1933.

The C12 was the top range model offered by Voisin which appeared towards the end 1926, initially in chassis-only form. This allowed its fortunate owner to have the car bodied by the coachbuilder of his or her choice.

Fiscally the car was rated at 24CV, the C12 was powered by a 4,530cc six cylinder engine. It had an impressive 3.58m chassis with twin fuel tanks mounted centrally on either side of the drive shaft to achieve Voisin's longstanding goal of optimising weight distribution.

The following year saw the C12 offered with lightweight factory bodies, a four-seat saloon and a seven-seater. Few changes took place between 1930 and its final year of production three years later, except for the greater choice of body styles.

A five-seater saloon was introduced for 1930, along with a 2-3 seater coupé, a 6-seater limousine and a 7-seater of the same type. By 1931, only three styles were available, the 5-seater saloon, the 4-seater demi berline and the 7-seat saloon.

Relatively few C12s were produced, some 60 examples in total of which only three are thought to survive.