canton of France

Dated canton reference

Record the authoritative designation, identifier and department needed to distinguish this canton from namesakes and earlier editions.

1. What official designation and identifier identify this canton in the geographic edition relevant to the task? definition
2. Which authoritative record establishes that identity and its departmental attachment? provenance

Applicable canton function

Record the function supported for the place and period without extending contemporary assumptions to historical or exceptional arrangements.

1. What territorial or electoral function does this canton have at the requested date? definition
2. Which dated source establishes that the ordinary departmental electoral regime applies, or documents an exception? provenance

Whole and partial communes

Record each included commune and the evidence defining any included fraction.

1. Which communes are wholly included and which are only partly included at the requested date? boundary
2. What legal description identifies each included commune fraction? provenance

Location membership evidence

Link usable geometry to its legal basis and record uncertainty near boundaries or where descriptions and datasets differ.

1. Which geometry and coordinate reference system represent the effective delimitation, and how was that correspondence checked? provenance
2. Can the requested location be assigned unambiguously, or must conflicting or insufficient boundary evidence be resolved first? action

Seats and election regime

Record the applicable seat arrangement; the contemporary general rule elects two departmental councillors of different sexes as a candidate pair. [Code électoral, Article L191](https://www.legifrance.gouv.fr/codes/section_lc/LEGITEXT000006070239/LEGISCTA000006134755/2026-02-23/)

1. How many seats and what election arrangement apply to this canton for the election being considered? definition
2. Which version of the electoral provisions establishes that arrangement for the relevant date? provenance

Representation at a date

Record links to mandates, including documented vacancies or replacements, without treating an election result as proof of indefinite incumbency.

1. Which mandate records establish who represents the canton at the requested date? provenance
2. Do documented vacancies, replacements or judicial decisions require updating the representation links? action

Effective canton version

Record the instrument, event type and effective dates establishing the canton version relevant to an operation.

1. Which instrument creates, renames, alters or abolishes this canton? provenance
2. When does the change become effective for the geographic or electoral use being requested? boundary

Predecessor-successor correspondence

Distinguish a rename from a territorial redistribution and preserve supported links across splits, mergers or replacement boundaries.

1. Which predecessor and successor territories correspond to this canton, and which portions move between them? boundary
2. Can existing records be carried forward directly, or must they be reassigned using locations or a documented correspondence? action

Supported canton population

Record whether a population figure covers the complete canton, including its commune fractions, and distinguish official figures from estimates.

1. What population concept, reference date and boundary edition does this figure measure? measurement
2. How were included commune fractions counted, and does the source support the reported canton total? provenance

True canton data compatibility

Record whether each dataset uses the legal canton, a canton-ou-ville or another dated geography, and what correspondence permits its use.

1. Does the dataset describe the legal canton, a canton-ou-ville or a different territorial edition? definition
2. What verified correspondence allows these observations to be joined or compared without silently changing their territorial coverage? action

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Multi-commune cantons (the ordinary rural and small-town form)
• Intra-urban cantons (several cantons carved inside one large commune)
• Mixed cantons (a fraction of an urban commune plus neighbouring communes), the typical 2015 design
• Single-commune cantons
• Overseas-department cantons (same legal type, different scale and institutional setting)
• Anciens cantons (pre-March 2015 geography, retained as a statistical vintage)
• Cantonal maps inherited by special-status collectivities where the conseil départemental itself has been abolished or absorbed

1. Which of these kinds and varieties hold for the sense of canton of France this model covers, and on what evidence? provenance

Identifiers and schemes

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Wikidata item (class) - Q18524218 - Class 'canton of France'; each individual canton has its own Q-id.
• INSEE Code officiel géographique (canton) - {department_code}{canton_code} where department_code is 2 digits in metropolitan France (3 in overseas) and canton_code is a 2-digit sequential number in older vintages, 4-digit in the 2015 geography - The live electoral geography is the 2015+ canton file; pre-2015 codes survive as 'ancien canton'.
• Wikidata property P2506 - INSEE canton code (as stored on the item) - Machine-readable link from a Wikidata canton item to the COG code.

1. Which of these identifiers and schemes hold for the sense of canton of France this model covers, and on what evidence? provenance

Standards and regulation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Loi n° 2013-403 du 17 mai 2013 (Parlement français) - recasts the canton as the binominal departmental constituency and orders redistricting.
• Code électoral, rules on élections départementales (État français) - one mixed pair of conseillers départementaux per canton, six-year term.
• Décrets de délimitation des cantons (2014 and later amendments), one decree per département, taken by the Government after Conseil d'État review.
• Jurisprudence of the Conseil constitutionnel and Conseil d'État on population equality of cantons (generally a 20% band around the departmental mean, with geographic exceptions).
• Code officiel géographique (INSEE) - naming, coding and vintage of cantons as statistical geography.
• Code général des collectivités territoriales - status of the département and its council, which the canton exists to elect.

1. Which of these standards and regulation hold for the sense of canton of France this model covers, and on what evidence? provenance

Real-world use

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Ballot paper and campaign map for élections départementales: each canton returns a binôme (one woman and one man) to the conseil départemental.
• INSEE tables and GIS layers: population, vital statistics and geographic extracts are still published on both the 2015 canton and the ancien-canton vintages.
• Rural service geography: the chef-lieu de canton remains the everyday name for the small town that historically held the juge de paix, tax office, gendarmerie brigade or notarial ressort, even where those services have moved.
• Addressing of some State field services and of older cadastral or notarial records that still cite the canton.
• Bridging variable in longitudinal research: analysts recode communes through the 2015 break using ancien-canton keys.

1. Which of these real-world use hold for the sense of canton of France this model covers, and on what evidence? provenance

Typical measurements

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• National stock of cantons - 2054 after the 2015 redistricting (about 4035 before); later vintages differ by a handful - count
• Resident population of a canton - about 10000-90000 nationally; inside one département most cantons lie within ±20% of that département's mean - inhabitants
• Land area - a few km² for an intra-urban fragment to several hundred km² in rural metropolitan France; overseas interior cantons can exceed 1000 - km²
• Communes (or commune fractions) per canton - 1-100+ - count
• Councillors returned - 2 (fixed: one woman and one man) - persons
• Electoral term - 6 - years

1. Which of these typical measurements hold for the sense of canton of France this model covers, and on what evidence? provenance

Failure modes and hazards

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Malapportionment as population drifts after a freeze of the map, so votes in growing suburban cantons weigh less than votes in declining rural ones.
• Annulment of a delimitation decree by the Conseil d'État (several 2014 maps were struck down or recast).
• Accusations of gerrymandering when the prefecture draws mixed urban-rural cantons.
• Break in statistical time series between the 2014 and 2015 geographies, producing mismatched joins if the vintage is ignored.
• Misalignment with EPCI / bassin de vie boundaries, so the canton is a poor proxy for the area people actually use.
• Loss of named rural chef-lieux after 2015 mergers, with knock-on closure or relocation of local services.
• Data and addressing errors from treating an ancien canton code as a current electoral canton, or the reverse.

1. Which of these failure modes and hazards hold for the sense of canton of France this model covers, and on what evidence? provenance

Regional variation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Paris has no cantons: the Conseil de Paris is elected on arrondissement municipal lines and sits as both municipal and departmental council.
• The Métropole de Lyon (2015) is carved out of the Rhône: that territory is not divided into cantons for a departmental election; the rest of the Rhône still is.
• Martinique and Guyane, as collectivités territoriales uniques, no longer elect a conseil départemental, so the canton survives there mainly as geography, not as a living constituency.
• Corsica's territorial collectivity absorbed the two departmental councils; cantons of Corse-du-Sud and Haute-Corse remain in the geographic code.
• Overseas departments use the same legal type with much larger areas and smaller populations, and Mayotte's cantonal map is younger than the 2015 metropolitan redraw.
• Alsace's Collectivité européenne d'Alsace (2021) merged two departmental councils while the underlying cantonal grid of Bas-Rhin and Haut-Rhin remains the reference for that election.
• The same French word 'canton' in neighbouring Switzerland names a federated state, which produces systematic name clash in border work.

1. Which of these regional variation hold for the sense of canton of France this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Arrondissement (France) - An arrondissement is a State administrative circumscription under a sub-prefect; a canton has no State officer and exists to elect departmental councillors. Test: presence of a sous-préfecture versus a chef-lieu de canton with no prefectural rank.
• Commune (France) - The commune is the basic collectivité territoriale with a mayor and council; the canton is not a legal person and has no executive. Test: does it have a maire and a SIREN of a commune?
• Département (France) - The département is the collectivité the canton exists to elect; it has legal personality, a prefect, and a budget. Test: legal personality and a conseil départemental, not a single constituency.
• Circonscription législative - Elects a deputy to the Assemblée nationale on a different map, usually several cantons in size. Test: which assembly is filled, and which decree drew the boundary.
• EPCI (communauté de communes / d'agglomération, etc.) - An EPCI is a legal person with transferred competences and often fiscal power; a canton is not. Test: SIREN of a groupement and a conseil communautaire versus a purely electoral/statistical code.
• Swiss canton - A Swiss canton is a federated state with a constitution and residual sovereignty; a French canton is a subordinate electoral slice of a département. Test: own constitution and membership of a federation versus absence of legal personality.
• Ancien canton versus canton 2015 - Same name, different vintage: the pre-2015 grid is a statistical relic, the 2015 grid is the live constituency. Test: which COG millésime and whether a binôme is elected on that map.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of canton of France this model covers, and on what evidence? provenance