The Morris Twenty-One was a vehicle of the upper class introduced by Morris in 1935 as a successor to the Morris Oxford Twenty.

The Morris 21 had, like his predecessor, a side-valve six-cylinder engine, but with a displacement of 2,916 cm³. All 4 wheels were suspended on semi-elliptic springs. The vehicles were available as a 4-door luxury sedans.

A year later the model was replaced with the more powerful Morris Twenty-Five.