Stage 1 of the 2023 Giro d'Italia was a flat stage that took place on .

The stage started in Fossacesia Marian and finished in Ortona, starting at with an expected finish at (average speed of 52 km/h).

The total distance of the stage was 20.9 km. The stage included 0 categorized climb(s) and 0 checkpoint(s), and had a total elevation gain of 391 m, and a total descent of -320 m.