The Dodge DO Series was a car made by Dodge in Detroit and was introduced in January 1933. It was the successor of the DK Series.

The car had a side-valve eight-cylinder engine with a capacity of 4623cc. This delivered a power output of 100bhp (74 kW) at 3,400rpm. Power was sent through an automatically actuated (by vacuum), single dry clutch and a three-speed (semi-automatic) transmission (with floor shift) to the rear wheels.

The chassis was 3099mm. Bodies offered included a four-door sedan, two-door coupe (with two or four seats), a two-door coupe Victoria with five seats and a two-door or four-door convertible was offered.

The DO chassis was also available for those customers who wanted to use an out-of-house coachbuilder.

In November 1933 the DO Series went out of production without a successor. Only after the Second World War, Dodge again offered an eight-cylinder car.