The Hillman Gnat was an experimental World War II era light armoured car developed in Britain.

The Hillman Gnat was designed around 1940 as a two-man light armoured car, it was intended to replace machine gun armed, unarmoured motorcycles that were fielded in significant numbers by the British Army, but were going out of favour at the time.

The Gnat's development, along with the Morris Salamander, was sponsored by the then Brigadier Vyvyan Pope.

The vehicle was armed with a single Bren gun and was not provided with a radio.

Impetus for the project waned upon the death of the now Major General Vyvyan Pope in 1941, and both it and the Salamander were cancelled in 1942.