Arrondissement of Castres

The arrondissement of Castres is an arrondissement of France. It is part of the Tarn "département". Its capital is the city of Castres.
History.
When the "arrondissements" were created on 17 February 1800, Castres was one of them in the Tarn department.
Geography.
It is the southernmost "arrondissement" of the department, with an area of . It is also the "arrondissement" with more people living there, with 194,373 inhabitants and a population density of inhabitants/km².
The "arrondissement" is bordered to the north by the "arrondissement" of Albi, to the northeast by the Aveyron (Occitanie) department, to the east by the Hérault (Occitanie) department, to the south by the Aude (Occitanie) department and to the west by the Haute-Garonne (Occitanie) department.
Composition.
Cantons.
After the reorganisation of the cantons in France, cantons are not subdivisions of the "arrondissements" so they could have "communes" that belong to different "arrondissements". That is the case of the Le Haut Dadou and the Les Portes du Tarn cantons where some "communes" are in the "arrondissement" of Castres and others in the "arrondissement" of Albi. The following table shows the distribution of the "communes" in the cantons and "arrondissements":
Communes.
The "arrondissement" of Castres has 151 "communes"; they are (with their INSEE codes):
The "communes" with more inhabitants in the "arrondissement" are: