The arrondissement of Lons-le-Saunier is an arrondissement of France.  It is part of the Jura département in the Bourgogne-Franche-Comté region. Its capital, and prefecture of the department, is the city of Lons-le-Saunier.

History
When the arrondissements of Jura were created in 1800, Lons-le-Saunier was one of them in the Jura department.

Geography
The arrondissement of Lons-le-Saunier is the largest arrondissement of the department, with an area of . It has a population of 126,071 inhabitants, the arrondissement with more inhabitants, and a population density of  inhabitants/km².

The arrondissement of Lons-le-Saunier is bordered to the north by the arrondissement Dole, to the east by the Doubs department, to the southeast by the arrondissement Saint-Claude, to the southwest by the Ain department and to the west by the Saône-et-Loire 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.

In the arrondissement of Lons-le-Saunier, there are nine cantons and seven of them have all their "communes" in the arrondissement:

 Arbois (3901)
 Bletterans (3903)
 Champagnole (3904)
 Lons-le-Saunier-1 (3907)
 Lons-le-Saunier-2 (3908)
 Moirans-en-Montagne (3909) (partly)
 Poligny (39129)
 Saint-Amour (3913)
 Saint-Laurent-en-Grandvaux (3915) (partly)

Communes
The arrondissement of Lons-le-Saunier has 258 communes; they are (with their INSEE codes):

 Alièze (39007)
 Andelot-en-Montagne (39009)
 Andelot-Morval (39010)
 Ardon (39015)
 Arinthod (39016)
 Arlay (39017)
 Aromas (39018)
 Arsure-Arsurette (39020)
 La Chailleuse (39021)
 Augea (39025)
 Augisey (39027)
 Balanod (39035)
 La Balme-d'Épy (39036)
 Barésia-sur-l'Ain (39038)
 Baume-les-Messieurs (39041)
 Beaufort (39043)
 Beffia (39045)
 Bief-des-Maisons (39052)
 Bief-du-Fourg (39053)
 Billecul (39055)
 Bletterans (39056)
 Blois-sur-Seille (39057)
 Blye (39058)
 Bois-de-Gand (39060)
 Boissia (39061)
 La Boissière (39062)
 Bonlieu (39063)
 Bonnefontaine (39065)
 Bornay (39066)
 Bourg-de-Sirod (39070)
 Bréry (39075)
 Briod (39079)
 Broissia (39080)
 Censeau (39083)
 Cerniébaud (39085)
 Cernon (39086)
 Cesancey (39088)
 Cézia (39089)
 Les Chalesmes (39091)
 Chambéria (39092)
 Champagnole (39097)
 Champrougier (39100)
 Chapelle-Voland (39104)
 Chapois (39105)
 Charcier (39107)
 Charency (39108)
 Charézier (39109)
 La Charme (39110)
 Charnod (39111)
 La Chassagne (39112)
 Château-Chalon (39114)
 Châtelneuf (39120)
 Châtillon (39122)
 Chaumergy (39124)
 Chaux-des-Crotenay (39129)
 La Chaux-en-Bresse (39132)
 Chavéria (39134)
 Chemenot (39136)
 Chemilla (39137)
 Chêne-Sec (39140)
 Chevreaux (39142)
 Chevrotaine (39143)
 Chille (39145)
 Chilly-le-Vignoble (39146)
 Chisséria (39148)
 Cize (39153)
 Clairvaux-les-Lacs (39154)
 Cogna (39156)
 Commenailles (39160)
 Condamine (39162)
 Condes (39163)
 Conliège (39164)
 Conte (39165)
 Cornod (39166)
 Cosges (39167)
 Courbette (39168)
 Courbouzon (39169)
 Courlans (39170)
 Courlaoux (39171)
 Cousance (39173)
 Hauteroche (39177)
 Crans (39178)
 Cressia (39180)
 Crotenay (39183)
 Cuisia (39185)
 Cuvier (39187)
 Denezières (39192)
 Desnes (39194)
 Les Deux-Fays (39196)
 Digna (39197)
 Domblans (39199)
 Dompierre-sur-Mont (39200)
 Doucier (39201)
 Doye (39203)
 Dramelay (39204)
 Écrille (39207)
 Entre-deux-Monts (39208)
 Val d'Épy (39209)
 Équevillon (39210)
 Esserval-Tartre (39214)
 L’Étoile (39217)
 La Favière (39221)
 Foncine-le-Bas (39227)
 Foncine-le-Haut (39228)
 Fontainebrux (39229)
 Fontenu (39230)
 Foulenay (39234)
 Francheville (39236)
 Fraroz (39237)
 La Frasnée (39239)
 Le Frasnois (39240)
 Frébuans (39241)
 Frontenay (39244)
 Genod (39247)
 Geruge (39250)
 Gevingey (39251)
 Gigny (39253)
 Gillois (39254)
 Gizia (39255)
 Graye-et-Charnay (39261)
 Hautecour (39265)
 Ladoye-sur-Seille (39272)
 Montlainsia (39273)
 Le Larderet (39277)
 Largillay-Marsonnay (39278)
 Larnaud (39279)
 Le Latet (39281)
 La Latette (39282)
 Lavans-sur-Valouse (39287)
 Lavigny (39288)
 Valzin en Petite Montagne (39290)
 Lent (39292)
 Loisia (39295)
 Lombard (39296)
 Longcochon (39298)
 Lons-le-Saunier (39300)
 Loulle (39301)
 Le Louverot (39304)
 Macornay (39306)
 Mantry (39310)
 Marigna-sur-Valouse (39312)
 Marigny (39313)
 Marnézia (39314)
 La Marre (39317)
 Maynal (39320)
 Menétru-le-Vignoble (39321)
 Menétrux-en-Joux (39322)
 Mérona (39324)
 Mesnois (39326)
 Messia-sur-Sorne (39327)
 Mièges (39329)
 Mignovillard (39331)
 Moiron (39334)
 Monnetay (39343)
 Monnet-la-Ville (39344)
 Montagna-le-Reconduit (39346)
 Montaigu (39348)
 Montain (39349)
 Montfleur (39353)
 Montigny-sur-l'Ain (39356)
 Montmorot (39362)
 Montrevel (39363)
 Montrond (39364)
 Mont-sur-Monnet (39366)
 Mournans-Charbonny (39372)
 Moutonne (39375)
 Moutoux (39376)
 Les Trois Châteaux (39378)
 Nance (39379)
 Nancuise (39380)
 Les Nans (39381)
 Nevy-sur-Seille (39388)
 Ney (39389)
 Nogna (39390)
 Nozeroy (39391)
 Onglières (39393)
 Onoz (39394)
 Orbagna (39395)
 Orgelet (39397)
 Pannessières (39404)
 Le Pasquier (39406)
 Passenans (39407)
 Patornay (39408)
 Perrigny (39411)
 Pillemoine (39419)
 Pimorin (39420)
 Le Pin (39421)
 Plainoiseau (39422)
 Plaisia (39423)
 Les Planches-en-Montagne (39424)
 Plénise (39427)
 Plénisette (39428)
 Poids-de-Fiole (39431)
 Pont-de-Poitte (39435)
 Pont-du-Navoy (39437)
 Présilly (39443)
 Publy (39445)
 Quintigny (39447)
 Recanoz (39454)
 Reithouse (39455)
 Relans (39456)
 Les Repôts (39457)
 Revigny (39458)
 Rix (39461)
 Rosay (39466)
 Rotalier (39467)
 Rothonay (39468)
 Ruffey-sur-Seille (39471)
 Rye (39472)
 Saffloz (39473)
 Sainte-Agnès (39474)
 Saint-Amour (39475)
 Saint-Didier (39480)
 Saint-Germain-en-Montagne (39481)
 Saint-Hymetière (39483)
 Saint-Jean-d'Étreux (39484)
 Val Suran (39485)
 Saint-Lamain (39486)
 Saint-Maur (39492)
 Saint-Maurice-Crillat (39493)
 Sapois (39503)
 Sarrogna (39504)
 Saugeot (39505)
 Sellières (39508)
 Sergenaux (39511)
 Sergenon (39512)
 Sirod (39517)
 Songeson (39518)
 Soucia (39519)
 Supt (39522)
 Syam (39523)
 Thoirette-Coisia (39530)
 Thoiria (39531)
 Thoissia (39532)
 Toulouse-le-Château (39533)
 La Tour-du-Meix (39534)
 Trenal (39537)
 Uxelles (39538)
 Valempoulières (39540)
 Valfin-sur-Valouse (39542)
 Vannoz (39543)
 Le Vaudioux (39545)
 Verges (39550)
 Véria (39551)
 Vernantois (39552)
 Le Vernois (39553)
 Vers-en-Montagne (39554)
 Vers-sous-Sellières (39555)
 Vertamboz (39556)
 Vescles (39557)
 Vevy (39558)
 Villeneuve-sous-Pymont (39567)
 Villevieux (39574)
 Le Villey (39575)
 Val-Sonnette (39576)
 Vincent-Froideville (39577)
 Voiteur (39582)
 Vosbles (39583) 

The communes in the arrondissement with more inhabitants are:

Related pages
 Arrondissements of the Jura department
 Communes of the Jura department

References

Lons-le-Saunier