Input (grade 7): Trets is a commune in the Bouches-du-Rh Ã ne department in southern France.
Output (grade 4): Trets is a commune of 10,709 people (2006). It is found in the region Provence-Alpes-C Ã te d'Azur in the Bouches-du-Rh Ã ne department in the south of France.