Clémentine Autain (born 26 May 1973) is a French politician and journalist representing the 11th constituency of Seine-Saint-Denis in the National Assembly since 2017. She is a member of the party La France Insoumise (LFI).

Autain is the daughter of singer Yvan Dautin and actress Dominique Laffin. A feminist activist, she is co-editor of the monthly publication Regards alongside Roger Martelli and co-secretary of the Copernic Foundation, a "think circle" critical of liberalism.

In 2001 Autain was elected to the Council of Paris for the 17th arrondissement with the support of the French Communist Party, where she served one term. As a councillor she developed the Conseils de la jeunesse de Paris (Paris Youth Councils). From 2001 to 2008 she served as deputy mayor of Paris under Bertrand Delanoë, responsible for youth affairs. She was a member of the executive board of the Organisme d'habitations à loyer modéré and the Offices publics d'aménagement et de construction, organizations responsible for managing low-cost housing in Paris. In 2014 she was elected to the municipal council of Sevran, where she also served one term.

Autain has been a deputy in the National Assembly for the 11th constituency of Seine-Saint-Denis since 2017 as a member of La France Insoumise. She currently holds a position in the Bureau of the National Assembly of the 15th legislature of the Fifth French Republic as a secretary. She has also been a regional councillor for Île-de-France since 2021, having previously held a seat on the regional council from 2015 until her resignation in 2017 to focus on her work as a deputy.