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):

 Aguts (81001)
 Aiguefonde (81002)
 Albine (81005)
 Algans (81006)
 Ambres (81011)
 Anglès (81014)
 Appelle (81015)
 Arfons (81016)
 Arifat (81017)
 Aussillon (81021)
 Bannières (81022)
 Barre (81023)
 Belcastel (81025)
 Belleserre (81027)
 Berlats (81028)
 Bertre (81030)
 Le Bez (81031)
 Blan (81032)
 Boissezon (81034)
 Bout-du-Pont-de-Larn (81036)
 Brassac (81037)
 Briatexte (81039)
 Brousse (81040)
 Burlats (81042)
 Busque (81043)
 Cabanès (81044)
 Cahuzac (81049)
 Cambon-lès-Lavaur (81050)
 Cambounès (81053)
 Cambounet-sur-le-Sor (81054)
 Les Cammazes (81055)
 Carbes (81058)
 Castres (81065)
 Caucalières (81066)
 Cuq (81075)
 Cuq-Toulza (81076)
 Damiatte (81078)
 Dourgne (81081)
 Durfort (81083)
 Escoussens (81084)
 Escroux (81085)
 Espérausses (81086)
 Fiac (81092)
 Fontrieu (81062)
 Fréjeville (81098)
 Garrevaques (81100)
 Garrigues (81102)
 Gijounet (81103)
 Giroussens (81104)
 Graulhet (81105)
 Guitalens-L'Albarède (81132)
 Jonquières (81109)
 Labastide-Rouairoux (81115)
 Labastide-Saint-Georges (81116)
 Laboulbène (81118)
 Labruguière (81120)
 Lacabarède (81121)
 Lacaune (81124)
 Lacaze (81125)
 Lacougotte-Cadoul (81126)
 Lacroisille (81127)
 Lacrouzette (81128)
 Lagardiolle (81129)
 Lagarrigue (81130)
 Lamontélarié (81134)
 Lasfaillades (81137)
 Lautrec (81139)
 Lavaur (81140)
 Lempaut (81142)
 Lescout (81143)
 Lugan (81150)
 Magrin (81151)
 Marzens (81157)
 Le Masnau-Massuguiès (81158)
 Massac-Séran (81159)
 Massaguel (81160)
 Maurens-Scopont (81162)
 Mazamet (81163)
 Missècle (81169)
 Montcabrier (81173)
 Montdragon (81174)
 Montfa (81177)
 Montgey (81179)
 Montpinier (81181)
 Montredon-Labessonnié (81182)
 Mont-Roc (81183)
 Moulayrès (81187)
 Moulin-Mage (81188)
 Mouzens (81189)
 Murat-sur-Vèbre (81192)
 Nages (81193)
 Navès (81195)
 Noailhac (81196)
 Palleville (81200)
 Payrin-Augmontel (81204)
 Péchaudier (81205)
 Peyregoux (81207)
 Pont-de-Larn (81209)
 Poudis (81210)
 Prades (81212)
 Pratviel (81213)
 Puéchoursi (81214)
 Puybegon (81215)
 Puycalvel (81216)
 Puylaurens (81219)
 Rayssac (81221)
 Le Rialet (81223)
 Roquecourbe (81227)
 Roquevidal (81229)
 Rouairoux (81231)
 Saint-Affrique-les-Montagnes (81235)
 Saint-Agnan (81236)
 Saint-Amancet (81237)
 Saint-Amans-Soult (81238)
 Saint-Amans-Valtoret (81239)
 Saint-Avit (81242)
 Saint-Gauzens (81248)
 Saint-Genest-de-Contest (81250)
 Saint-Germain-des-Prés (81251)
 Saint-Germier (81252)
 Saint-Jean-de-Rives (81255)
 Saint-Jean-de-Vals (81256)
 Saint-Julien-du-Puy (81258)
 Saint-Lieux-lès-Lavaur (81261)
 Saint-Paul-Cap-de-Joux (81266)
 Saint-Pierre-de-Trivisy (81267)
 Saint-Salvi-de-Carcavès (81268)
 Saint-Salvy-de-la-Balme (81269)
 Saint-Sernin-lès-Lavaur (81270)
 Saint-Sulpice-la-Pointe (81271)
 Saïx (81273)
 Sauveterre (81278)
 Sémalens (81281)
 Senaux (81282)
 Serviès (81286)
 Sorèze (81288)
 Soual (81289)
 Teulat (81298)
 Teyssode (81299)
 Vabre (81305)
 Valdurenque (81307)
 Veilhes (81310)
 Vénès (81311)
 Verdalle (81312)
 Viane (81314)
 Vielmur-sur-Agout (81315)
 Villeneuve-lès-Lavaur (81318)
 Le Vintrou (81321)
 Viterbe (81323)
 Viviers-lès-Lavaur (81324)
 Viviers-lès-Montagnes (81325)

The communes with more inhabitants in the arrondissement are:

Related pages
 Arrondissements of the Tarn department
 Communes of the Tarn department

References

Castres
Occitanie