| Loos En Gohelle (62750) | - | - |
| Lorgies (62840) | - | - |
| Lottinghen (62240) | - | - |
| Louches (62610) | - | - |
| Lozinghem (62540) | - | - |
| Lugy (62310) | - | - |
| Lumbres (62380) | - | - |
| Magnicourt En Comte (62127) | - | - |
| Magnicourt Sur Canche (62270) | - | - |
| Maintenay (62870) | - | - |
| Maisnil (62130) | - | - |
| Maisnil Les Ruitz (62620) | - | - |
| Maisoncelle (62310) | - | - |
| Maizieres (62127) | - | - |
| Mametz (62120) | - | - |
| Manin (62810) | - | - |
| Maninghem (62650) | - | - |
| Maninghen Henne (62250) | - | - |
| Marant (62170) | - | - |
| Marck (62730) | - | - |
| Marconne (62140) | - | - |
| Marconnelle (62140) | - | - |
| Marenla (62990) | - | - |
| Maresquel Ecquemicou (62186) | - | - |
| Maresquel Ecquemicourt (62990) | - | - |
| Marest (62550) | - | - |
| Maresville (62630) | - | - |
| Marles Les Mines (62540) | - | - |
| Marles Sur Canche (62170) | - | - |
| Maroeuil (62161) | - | - |
| Marquay (62127) | - | - |
| Marquion (62860) | - | - |
| Marquise (62250) | - | - |
| Martinpuich (62450) | - | - |
| Matringhem (62310) | - | - |
| Mazingarbe (62670) | - | - |
| Mazinghem (62120) | - | - |
| Mencas (62310) | - | - |
| Menneville (62240) | - | - |
| Mentque Notbecourt (62890) | - | - |
| Mercatel (62217) | - | - |
| Merck St Lievin (62560) | - | - |
| Mericourt (62680) | - | - |
| Merlimont (62155) | - | - |
| Metz En Couture (62124) | - | - |
| Metz En Couture (62197) | - | - |
| Meurchin (62410) | - | - |
| Mingoval (62690) | - | - |
| Moeuvres (62147) | - | - |
| Molinghem (62330) | - | - |
| Moncheaux Les Frevent (62270) | - | - |
| Monchel Sur Canche (62270) | - | - |
| Monchiet (62123) | - | - |
| Monchy Au Bois (62111) | - | - |
| Monchy Breton (62127) | - | - |
| Monchy Cayeux (62134) | - | - |
| Monchy Le Preux (62118) | - | - |
| Mondicourt (62760) | - | - |
| Mont Bernanchon (62350) | - | - |
| Mont St Eloi (62144) | - | - |
| Montcavrel (62170) | - | - |
| Montenescourt (62123) | - | - |
| Montigny En Gohelle (62640) | - | - |
| Montreuil (62170) | - | - |
| Monts En Ternois (62130) | - | - |
| Morchies (62124) | - | - |
| Moringhem (62910) | - | - |
| Morval (62450) | - | - |
| Mory (62159) | - | - |
| Moulle (62910) | - | - |
| Mouriez (62140) | - | - |
| Moyenneville (62121) | - | - |
| Muncq Nieurlet (62890) | - | - |
| Nabringhen (62142) | - | - |
| Nedon (62550) | - | - |
| Nedonchel (62550) | - | - |
| Nempont St Firmin (62180) | - | - |
| Nesles (62152) | - | - |
| Neufchatel Hardelot (62152) | - | - |
| Neulette (62770) | - | - |
| Neuve Chapelle (62840) | - | - |
| Neuville Au Cornet (62130) | - | - |
| Neuville Bourjonval (62124) | - | - |
| Neuville Sous Montreuil (62170) | - | - |
| Neuville St Vaast (62580) | - | - |
| Neuville St Vaast (62194) | - | - |
| Neuville Vitasse (62217) | - | - |
| Neuvireuil (62580) | - | - |
| Nielles Les Ardres (62610) | - | - |
| Nielles Les Blequin (62154) | - | - |
| Nielles Les Blequin (62380) | - | - |
| Nielles Les Calais (62185) | - | - |
| Noeux Les Auxi (62390) | - | - |
| Noeux Les Mines (62290) | - | - |
| Nordausques (62890) | - | - |
| Noreuil (62128) | - | - |
| Norrent Fontes (62120) | - | - |
| Nort Leulinghem (62890) | - | - |
| Nortkerque (62370) | - | - |
| Nouvelle Eglise (62370) | - | - |