Stage 1 of the 2023 Tour de Suisse was a flat stage that took place on .

The stage started in Einsiedeln and finished in Einsiedeln, starting at with an expected finish at (average speed of 51 km/h).

The total distance of the stage was 12.7 km. The stage included 0 categorized climb(s) and 1 checkpoint(s), and had a total elevation gain of 65 m, and a total descent of -66 m.