Judith Sarah Jäger Bellaiche (born 2 February 1971, Lille, France) is a Swiss lawyer, Green Liberal Party politician who served as a member of the National Council from 2019 to 2023.

[1][2] She is the managing director of Swico trade association.

She began a career in finance where she worked for several years before co-founding a business.

[3][4] Bellaiche began her political career in her local community as an elected councilor in Kilchberg, Zürich where she served for 8 years.

She headed building construction, real estate and planning department.