The Hanriot HD.17 was a French trainer seaplane of the 1920s. It was essentially a floatplane version of the ubiquitous HD.14 with a revised tail and a more powerful engine. Over 50 examples were operated by the Aéronautique Maritime, of which seven were converted to landplanes. A small number of HD.17s were exported to Estonia and Latvia. Further development resulted in the HD.41H.