Input (grade 7): Rognes is a commune in the Bouches-du-Rh Ã ne department in southern France.
Output (grade 4): Rognes is a commune of 4,194 people (1999). 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.