Anna, Comtesse Mathieu de Noailles (Anna Elisabeth Bibesco-Bassaraba de Brancovan) (15 November 1876 – 30 April 1933) was a French writer of Romanian and Greek descent, a poet and a socialist feminist.

[1] Born Princess Anna Elisabeth Bibesco-Bassaraba de Brancovan in Paris, she was a descendant of the Bibescu and Craioveşti families of Romanian boyars.

Her Greek mother was the former Ralouka (Rachel) Mussurus, a musician, to whom the Polish composer Ignacy Paderewski dedicated several of his compositions.

Via her mother, Anna de Noailles was a great-great-granddaughter of Sophronius of Vratsa, one of the leading figures of the Bulgarian National Revival, through his grandson Stefan Bogoridi, caimacam of Moldavia.

She had friendly relations with the intellectual, literary and artistic elite of the day including Marcel Proust, Francis Jammes, Colette, André Gide, Frédéric Mistral, Robert de Montesquiou-Fezensac, Rainer Maria Rilke, Paul Valéry, Jean Cocteau, Pierre Loti, Paul Hervieu, and Max Jacob.