The Hanriot D.I was a French monoplane racing aircraft, designed in France in 1912 and strongly influenced by Nieuport practice.

Pagny's designs reflected Nieuport practice, particularly with the replacement of Hanriot's graceful boat-like shell fuselages with flat sided, deep chested ones.

Landing wires on each side met over the fuselage at a short pyramidal four strut pylon like that on the Nieuport IV.

[5] In February 1913 a Hanriot, very similar to the D.I but fitted with a 80 hp (60 kW) Gnome engine made a flight across the Alps.

[7] The Hanriot D.I formed the basis of the much more powerful but otherwise similar Ponnier D.III 1913 Gordon Bennett Trophy racer.