The main cities , in 2012 , in the arrondissement are Carcassonne ( 47,068 inhabitants ) , Castelnaudary ( 11,748 inhabitants ) and Trèbes ( 5,280 inhabitants ) .
The main cities in the `` arrondissement '' are Carcassonne ( 47,068 inhabitants ) , Castelnaudary ( 11,748 inhabitants ) and Trèbes ( 5,280 inhabitants ) .