The canton of Saint-Julien-en-Genevois (French: Canton de Saint-Julien-en-Genevois) is a canton (an administrative division) in the western part of the Haute-Savoie department in Southeastern France.
Its seat is Saint-Julien-en-Genevois; the canton is located on the Swiss border southwest of Geneva. Its borders were modified at the canton reorganisation that came into effect in March 2015. Since then, it elects two members of the Departmental Council of Haute-Savoie.
The canton of Saint-Julien-en-Genevois consists of the following communes: