| Calais Cedex (62107) | - | - |
| Calais Cedex (62108) | - | - |
| Calais Cedex (62109) | - | - |
| Calais Cedex (62225) | - | - |
| Calais Cedex (62226) | - | - |
| Calais Cedex (62227) | - | - |
| Calais Cedex (62228) | - | - |
| Calais Cedex (62229) | - | - |
| Calonne Ricouart (62470) | - | - |
| Calonne Sur La Lys (62350) | - | - |
| Camblain Chatelain (62470) | - | - |
| Camblain L'abbe (62690) | - | - |
| Cambligneul (62690) | - | - |
| Cambrin (62149) | - | - |
| Camiers (62176) | - | - |
| Campagne Les Boulonnais (62650) | - | - |
| Campagne Les Guines (62340) | - | - |
| Campagne Les Hesdin (62870) | - | - |
| Campagne Les Wardrecques (62120) | - | - |
| Campigneulles Les Grandes (62170) | - | - |
| Campigneulles Les Petites (62170) | - | - |
| Canettemont (62270) | - | - |
| Canlers (62310) | - | - |
| Canteleux (62270) | - | - |
| Capelle Fermont (62690) | - | - |
| Capelle Les Hesdin (62140) | - | - |
| Carency (62144) | - | - |
| Carly (62830) | - | - |
| Carvin (62220) | - | - |
| Cauchy A La Tour (62260) | - | - |
| Caucourt (62150) | - | - |
| Caumont (62140) | - | - |
| Cavron St Martin (62140) | - | - |
| Chelers (62127) | - | - |
| Cheriennes (62140) | - | - |
| Cherisy (62128) | - | - |
| Cherisy (62198) | - | - |
| Chocques (62920) | - | - |
| Clairmarais (62500) | - | - |
| Clarques (62129) | - | - |
| Clenleu (62650) | - | - |
| Clerques (62890) | - | - |
| Clety (62380) | - | - |
| Colembert (62142) | - | - |
| Colline Beaumont (62180) | - | - |
| Conchil Le Temple (62180) | - | - |
| Conchy Sur Canche (62270) | - | - |
| Condette (62360) | - | - |
| Contes (62990) | - | - |
| Conteville En Ternois (62130) | - | - |
| Conteville Les Boulogne (62126) | - | - |
| Coquelles (62231) | - | - |
| Corbehem (62112) | - | - |
| Cormont (62630) | - | - |
| Couin (62760) | - | - |
| Coullemont (62158) | - | - |
| Coulogne (62137) | - | - |
| Coulomby (62380) | - | - |
| Coupelle Neuve (62310) | - | - |
| Coupelle Vieille (62310) | - | - |
| Courcelles Le Comte (62121) | - | - |
| Courcelles Les Lens (62970) | - | - |
| Courrieres (62710) | - | - |
| Courset (62240) | - | - |
| Couturelle (62158) | - | - |
| Coyecques (62560) | - | - |
| Cremarest (62240) | - | - |
| Crepy (62310) | - | - |
| Crequy (62310) | - | - |
| Croisette (62130) | - | - |
| Croisilles (62128) | - | - |
| Croix En Ternois (62130) | - | - |
| Cucq (62780) | - | - |
| Cuinchy (62149) | - | - |
| Cuinchy (62148) | - | - |
| Dainville (62000) | - | - |
| Dannes (62187) | - | - |
| Delettes (62129) | - | - |
| Denier (62810) | - | - |
| Dennebroeucq (62560) | - | - |
| Desvres (62240) | - | - |
| Dieval (62460) | - | - |
| Dieval (62213) | - | - |
| Divion (62460) | - | - |
| Dohem (62380) | - | - |
| Dohem (62191) | - | - |
| Doignies (62147) | - | - |
| Douchy Les Ayette (62116) | - | - |
| Doudeauville (62830) | - | - |
| Dourges (62119) | - | - |
| Douriez (62870) | - | - |
| Douvrin (62138) | - | - |
| Drocourt (62320) | - | - |
| Drouvin Le Marais (62131) | - | - |
| Duisans (62161) | - | - |
| Duisans (62211) | - | - |
| Dury (62156) | - | - |
| Echinghen (62360) | - | - |
| Eclimeux (62770) | - | - |
| Ecoivres (62270) | - | - |