The de Havilland DH.37 was a British three-seat sporting biplane of the 1920s designed and built by de Havilland for Alan Butler. The first of the two examples built flew extensively for five years before being converted to a single-seater and having its engine upgraded to a 300 hp (224 kW) A.D.C. Nimbus . It crashed in June 1927.
The second aircraft was sold to Australia, and was flown by the Controller of Civil Aviation. Sold to the Guinea Gold Company in New Guinea, it was the first aircraft flown in that country. It crashed in New South Wales in March 1932.