The arrondissement of Mont-de-Marsan is an arrondissement of France.  It is part of the Landes département in the Nouvelle-Aquitaine region. Its capital, and prefecture of the department, is the city of Mont-de-Marsan.

History
When the Landes department was created on 17 February 1800, the arrondissement of Mont-de-Marsan was part of that original department.

Geography
The arrondissement of Mont-de-Marsan is the northernmost of the arrondissements of the department, with an area of , the largest of the department. It has 179,821 inhabitants and a population density of  inhabitants/km².

The arrondissement is bordered to the north by the Gironde department, to the northeast by the Lot-et-Garonne department, to the east by the Gers department (Occitanie region), to the south by the Pyrénées-Atlantiques department and to the west by the arrondissement of Dax and the Atlantic Ocean.

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.

In the arrondissement of Mont-de-Marsan, there are two canton where not all their "communes" are in the arrondissement: Côte d'Argent and Pays morcenais tarusate. The following table shows the distribution of the "communes" in the cantons and arrondissements:

Communes
The arrondissement of Mont-de-Marsan has 178 communes; they are (with their INSEE codes):

 Aire-sur-l'Adour (40001)
 Arboucave (40005)
 Arengosse (40006)
 Argelouse (40008)
 Arjuzanx (40009)
 Artassenx (40012)
 Arthez-d'Armagnac (40013)
 Arue (40014)
 Arx (40015)
 Aubagnan (40016)
 Audignon (40017)
 Aureilhan (40019)
 Aurice (40020)
 Bahus-Soubiran (40022)
 Banos (40024)
 Bas-Mauco (40026)
 Bascons (40025)
 Bats (40029)
 Baudignan (40030)
 Belhade (40032)
 Benquet (40037)
 Betbezer-d'Armagnac (40039)
 Bias (40043)
 Biscarrosse (40046)
 Bordères-et-Lamensans (40049)
 Bostens (40050)
 Bougue (40051)
 Bourdalat (40052)
 Bourriot-Bergonce (40053)
 Bretagne-de-Marsan (40055)
 Brocas (40056)
 Buanes (40057)
 Bélis (40033)
 Cachen (40058)
 Callen (40060)
 Campagne (40061)
 Campet-et-Lamolère (40062)
 Canenx-et-Réaut (40064)
 Castandet (40070)
 Castelnau-Tursan (40072)
 Castelner (40073)
 Cauna (40076)
 Cazalis (40079)
 Cazères-sur-l'Adour (40080)
 Classun (40082)
 Clèdes (40083)
 Commensacq (40085)
 Coudures (40086)
 Créon-d'Armagnac (40087)
 Cère (40081)
 Duhort-Bachen (40091)
 Dumes (40092)
 Escalans (40093)
 Escource (40094)
 Estigarde (40096)
 Eugénie-les-Bains (40097)
 Eyres-Moncube (40098)
 Fargues (40099)
 Gabarret (40102)
 Gaillères (40103)
  Garein (40105)
 Garrosse (40107)
 Gastes (40108)
 Geaune (40110)
 Geloux (40111)
 Grenade-sur-l'Adour (40117)
 Hagetmau (40119)
 Haut-Mauco (40122)
 Herré (40124)
 Hontanx (40127)
 Horsarrieu (40128)
 Labastide-Chalosse (40130)
 Labastide-d'Armagnac (40131)
 Labouheyre (40134)
 Labrit (40135)
 Lacajunte (40136)
 Lacquy (40137)
 Lacrabe (40138)
 Laglorieuse (40139)
 Lagrange (40140)
 Larrivière-Saint-Savin (40145)
 Latrille (40146)
 Lauret (40148)
 Le Frêche (40100)
 Le Sen (40297)
 Le Vignau (40329)
 Lencouacq (40149)
 Lesperon (40152)
 Liposthey (40156)
 Losse (40158)
 Lubbon (40161)
 Lucbardez-et-Bargues (40162)
 Luglon (40165)
 Lussagnet (40166)
 Luxey (40167)
 Lüe (40163)
 Maillas (40169)
 Maillères (40170)
 Mano (40171)
 Mant (40172)
 Mauries (40174)
 Maurrin (40175)
 Mauvezin-d'Armagnac (40176)
 Mazerolles (40178)
 Mimizan (40184)
 Miramont-Sensacq (40185)
 Momuy (40188)
 Monget (40189)
  Monségur (40190)
 Mont-de-Marsan (40192)
 Montaut (40191)
 Montgaillard (40195)
 Montsoué (40196)
 Montégut (40193)
 Morcenx (40197)
 Morganx (40198)
 Moustey (40200)
 Mézos (40182)
 Onesse-et-Laharie (40210)
 Ousse-Suzan (40215)
 Parentis-en-Born (40217)
 Parleboscq (40218)
 Payros-Cazautets (40219)
 Perquie (40221)
 Peyre (40223)
 Philondenx (40225)
 Pimbo (40226)
 Pissos (40227)
 Pontenx-les-Forges (40229)
 Poudenx (40232)
 Pouydesseaux (40234)
 Pujo-le-Plan (40238)
 Puyol-Cazalet (40239)
 Pécorade (40220)
 Renung (40240)
Retjons (40164)
 Rimbez-et-Baudiets (40242)
 Roquefort (40245)
 Sabres (40246)
 Saint-Agnet (40247)
 Saint-Avit (40250)
 Saint-Cricq-Chalosse (40253)
 Saint-Cricq-Villeneuve (40255)
 Saint-Gein (40259)
 Saint-Gor (40262)
 Saint-Julien-d'Armagnac (40265)
 Saint-Justin (40267)
 Saint-Loubouer (40270)
 Saint-Martin-d'Oney (40274)
 Saint-Maurice-sur-Adour (40275)
 Saint-Paul-en-Born (40278)
 Saint-Perdon (40280)
 Saint-Pierre-du-Mont (40281)
 Saint-Sever (40282)
 Sainte-Colombe (40252)
 Sainte-Eulalie-en-Born (40257)
 Sainte-Foy (40258)
 Samadet (40286)
 Sanguinet (40287)
 Sarbazan (40288)
 Sarraziet (40289)
 Sarron (40290)
 Saugnacq-et-Muret (40295)
 Serres-Gaston (40298)
 Serreslous-et-Arribans (40299)
 Sindères (40302)
 Solférino (40303)
 Sorbets (40305)
 Sore (40307)
 Trensacq (40319)
 Uchacq-et-Parentis (40320)
 Urgons (40321)
 Vert (40323)
 Vielle-Soubiran (40327)
 Vielle-Tursan (40325)
 Villeneuve-de-Marsan (40331)
 Ychoux (40332)
 Ygos-Saint-Saturnin (40333)

The communes in the arrondissement with more inhabitants are:

Related pages
 Arrondissements of the Landes department
 Communes of the Landes department

References

Mont-de-Marsan