User: What are the 13 departments and main communities of France's administrative region of Occitania?
Assistant: The 13 Departments of Occitania are:
- Ariège
- Aude
- Aveyron
- Gard
- Haute-Garonne
- Gers
- Hérault
- Lot
- Lozère
- Hautes-Pyrénées
- Pyrénées-Orientales
- Tarn
- Tarn-et-Garonne

The main communities located within Occitania are:
- Toulouse (population: 479,553)
- Montpellier (population: 285,121)
- Nîmes (population: 150,610)
- Perpignan (population: 120,158)
- Béziers (population: 77,177)
- Montauban (population: 60,810)
- Narbonne (population: 54,700)
- Albi (population: 50,759)
- Carcassonne (population: 47,365)