Marthe Niel (29 December 1878 – 18 November 1928) was a French aviator, becoming the second woman in the world to earn an aeroplane pilot's licence on 19 September 1910.

[1][2] Niel was born Marie-Ange Denieul in Le Cannée, a hamlet in the commune of Paimpont, Ille-et-Vilaine.

She was the daughter of Joachim Denieul, a farm worker, and his wife Marie-Joseph Saget.

[3] On 9 May 1900, she married Pierre Firmin Fontalbat, a wine merchant, after which she worked as a cook.

[4] In April 1910, she was admitted to the piloting school founded by aeroplane builder Paul Koechlin at Mourmelon-le-Grand.