The Curtiss Model 55 Kingbird was an airliner built in small numbers in the United States in the early 1930s.

The Kingbird had two engine nacelles mounted on the struts on either side of the fuselage that braced the wing and the outrigger undercarriage.

A distinctive design feature was the aircraft's blunt nose, located behind the propeller arcs.

For the same reason, the Thrush's single tailfin was replaced by twin tails on the Kingbird, and the main production model, the D-2 fitted a second horizontal stabilizer and elevator between these fins.

The United States Marine Corps also purchased an example, first designating it JC-1, then RC-1 and using it as an air ambulance.