List of de Havilland aircraft
This is a list of aircraft produced or proposed by Geoffrey de Havilland or designed at the de Havilland Aircraft Company from its founding in 1920 until its purchase by the Hawker Siddeley Group in 1959.
The aircraft are ordered by de Havilland model number; The numbers started with de Havilland's entry into the Airco company. although Airco built the planes, their design was owned by de Havilland and when de Havilland started his own company, he continued the numbering. This went on even for later designs of de Havilland's aircraft company, even if they were designed by a factory team with little input from de Havilland himself. The DH.89, for example, was the de Havilland's 89th design.
The designs DH.121 and DH.125 which were under development when de Havilland merged into the Hawker Siddeley Group kept their numbering and were produced as the Hawker 121 Trident and the Hawker 125.
The list does not include aircraft designed by de Havilland Canada or de Havilland Australia, founded as de Havilland subsidiaries.
Designs prior to company foundation
These are designs by Geoffrey de Havilland while working for himself or for other manufacturers.| Model | Name | First flight | Remarks |
| Biplane No. 1 | December 1909 | single-seat biplane | |
| Biplane No. 2 | 25 September 1910 | single-seat pusher configuration biplane – became the F.E.1 when de Havilland joined the staff at the Royal Aircraft Factory | |
| DH.1 | Airco DH.1 | January 1915 | two-seat reconnaissance biplane |
| DH.2 | Airco DH.2 | 1 June 1915 | single-seat pusher configuration biplane fighter |
| DH.3 | Airco DH.3 | twin-engined bomber | |
| DH.4 | Airco DH.4 | August 1916 | two-seat biplane day bomber |
| DH.5 | Airco DH.5 | October 1916 | single-seat fighter |
| DH.6 | Airco DH.6 | 1916 | trainer |
| DH.7 | Single-seat tractor fighter project with a Rolls-Royce Falcon engine, not built | ||
| DH.8 | Pusher fighter projected to be fitted with a Coventry Ordnance Works gun, not built. | ||
| DH.9 | Airco DH.9 | July 1917 | two-seat day bomber biplane |
| DH.10 | Airco DH.10 Amiens | 4 March 1918 | twin-engine day bomber biplane |
| DH.11 | Airco Oxford | 1919 | twin-engined day bomber |
| DH.12 | DH.12 | modified DH.11 – unbuilt | |
| DH.13 | Not used | ||
| DH.14 | Okapi | 1919 | Two-seat day bomber to replace DH.4 and DH.9 |
| DH.15 | Airco Gazelle | 1919 | Experimental aircraft similar to DH.9 |
| DH.16 | Airco DH.16 | 1919 | Redesigned DH9 with four-seat enclosed cockpit for use as a commercial biplane |
| DH.17 | Twin-engined 16-passenger biplane project, not built. | ||
| DH.18 | DH.18 | 1920 | 8 seat Single-engined commercial aircraft |
| DH.19 | Rolls-Royce Falcon powered two-seat cabin tourer, not built | ||
| DH.20 | ABC Wasp powered single-seat sporting biplane, not built | ||
| DH.21 | Heavy transport design study with two engines driving one propeller, not built |