The Steyr 30 is a passenger car of that was built by Steyr-Werke AG between 1930 and 1933. It was built as a successor to the model XX. The car was designed by Ferdinand Porsche. The car was first shown at the 1930 Parish Motor Show.

The car had a 6-cylinder inline engine mounted in the front of the car. A four-speed manual gearbox was fitted and power was delivered to the rear wheels. The front wheels were on a rigid axle with longitudinal leaf-spring suspension. The rear swing axle had a transverse leaf spring. By 1932 the standard version arose of which just 2200 were made.

Also identical to the 30 was the Steyr 30 type 45 meter which was a taxi version offered from 1930 to 1933 taxi version. Just 666 were built.

In 1932 the Steyr 30S was introduced. This model was a convertible with two or four seats and had a more powerful engine. It was significantly longer than the sedan. Only 620 pieces were made.

Another model introduced in 1932 was the Steyr 30 SL. It was a six-seater sedan with the same engine as the sports car. Only 55 cars were made.

The 30 was succeeded by the Steyr 430.