| Leuilly Sous Coucy (02380) | - | - |
| Leury (02880) | - | - |
| Leuze (02500) | - | - |
| Levergies (02420) | - | - |
| Lhuys (02220) | - | - |
| Licy Clignon (02810) | - | - |
| Lierval (02860) | - | - |
| Liesse (02350) | - | - |
| Liesse Notre Dame (02350) | - | - |
| Liez (02700) | - | - |
| Lime (02220) | - | - |
| Lislet (02340) | - | - |
| Lizy (02320) | - | - |
| Logny Les Aubenton (02500) | - | - |
| Lombray (02300) | - | - |
| Longchamps (02120) | - | - |
| Longpont (02600) | - | - |
| Longueval Barbonval (02160) | - | - |
| Lor (02190) | - | - |
| Louatre (02600) | - | - |
| Loupeigne (02130) | - | - |
| Lucy Le Bocage (02400) | - | - |
| Lugny (02140) | - | - |
| Luzoir (02500) | - | - |
| Ly Fontaine (02440) | - | - |
| Maast Et Violaine (02220) | - | - |
| Machecourt (02350) | - | - |
| Macogny (02470) | - | - |
| Macquigny (02120) | - | - |
| Magny La Fosse (02420) | - | - |
| Maissemy (02490) | - | - |
| Maizy (02160) | - | - |
| Malzy (02120) | - | - |
| Manicamp (02300) | - | - |
| Marchais (02350) | - | - |
| Marchais En Brie (02540) | - | - |
| Marcy (02720) | - | - |
| Marcy Sous Marle (02250) | - | - |
| Marest Dampcourt (02300) | - | - |
| Mareuil En Dole (02130) | - | - |
| Marfontaine (02140) | - | - |
| Margival (02880) | - | - |
| Marigny En Orxois (02810) | - | - |
| Marizy St Mard (02470) | - | - |
| Marizy Ste Genevieve (02470) | - | - |
| Marle (02250) | - | - |
| Marle (02250) | - | - |
| Marly Gomont (02120) | - | - |
| Martigny (02500) | - | - |
| Martigny Courpierre (02860) | - | - |
| Mauregny En Haye (02820) | - | - |
| Mayot (02800) | - | - |
| Mennessis (02700) | - | - |
| Menneville (02190) | - | - |
| Mennevret (02630) | - | - |
| Mennevret (02710) | - | - |
| Mercin Et Vaux (02200) | - | - |
| Merlieux Et Fouquerolles (02000) | - | - |
| Merval (02160) | - | - |
| Mesbrecourt Richecourt (02270) | - | - |
| Mesnil St Laurent (02720) | - | - |
| Meurival (02160) | - | - |
| Mezieres Sur Oise (02240) | - | - |
| Mezy Moulins (02650) | - | - |
| Missy Aux Bois (02200) | - | - |
| Missy Les Pierrepont (02350) | - | - |
| Missy Sur Aisne (02880) | - | - |
| Molain (02110) | - | - |
| Molinchart (02000) | - | - |
| Monampteuil (02000) | - | - |
| Monceau Le Neuf Et Faucou (02270) | - | - |
| Monceau Le Waast (02840) | - | - |
| Monceau Les Leups (02270) | - | - |
| Monceau Sur Oise (02120) | - | - |
| Mondrepuis (02500) | - | - |
| Monnes (02470) | - | - |
| Mons En Laonnois (02000) | - | - |
| Mont D'origny (02390) | - | - |
| Mont Notre Dame (02220) | - | - |
| Mont St Jean (02360) | - | - |
| Mont St Martin (02220) | - | - |
| Mont St Pere (02400) | - | - |
| Montaigu (02820) | - | - |
| Montbavin (02000) | - | - |
| Montbrehain (02110) | - | - |
| Montchalons (02860) | - | - |
| Montcornet (02340) | - | - |
| Montcornet (02340) | - | - |
| Montescourt Lizerol (02440) | - | - |
| Montescourt Lizerolles (02440) | - | - |
| Montfaucon (02540) | - | - |
| Montgobert (02600) | - | - |
| Montgru St Hilaire (02210) | - | - |
| Monthenault (02860) | - | - |
| Monthiers (02400) | - | - |
| Monthurel (02330) | - | - |
| Montigny En Arrouaise (02110) | - | - |
| Montigny L'allier (02810) | - | - |
| Montigny Le Franc (02250) | - | - |
| Montigny Lengrain (02290) | - | - |