César Marie Félix Ancey (15 November 1860 – 10 October 1906) was a French conchologist and entomologist.
For 23 years Ancey was ‘conservateur’ of collections for Charles Oberthür (1845–1924) at Rennes.
Ancey was then a ‘fonctionnaire’ at Mascara until his death.The genus Anceya was dedicated to him by Jules René Bourguignat.