Sophie Achard (born 1977)[1] is a French statistician and neuroscientist whose research concerns the statistics of the pattern of connectivity in the brain.

[2] She is a director of research for the French National Centre for Scientific Research (CNRS), affiliated with the French Institute for Research in Computer Science and Automation (Inria) laboratory at Grenoble Alpes University.

Achard studied mathematics, statistics, and numerical analysis at Jean Monnet University, earning a bachelor's degree in 1999.

She earned a master's degree through research on the statistics of mixture models at Joseph Fourier University in Grenoble 2000, and completed a Ph.D. there in 2003.

[3] Her doctoral dissertation, Mesures de dépendance pour la séparation aveugle de sources : application aux mélanges post non linéaires, was directed by Dinh-Tuan Pham and Christian Jutten.