| Inghem (62129) | - | - |
| Inxent (62170) | - | - |
| Isbergues (62330) | - | - |
| Isques (62360) | - | - |
| Ivergny (62810) | - | - |
| Izel Les Equerchin (62490) | - | - |
| Izel Les Hameaux (62690) | - | - |
| Journy (62850) | - | - |
| L'arbret (62158) | - | - |
| L'arbret (62158) | - | - |
| La Calotterie (62170) | - | - |
| La Capelle Les Boulogne (62360) | - | - |
| La Cauchie (62158) | - | - |
| La Comte (62150) | - | - |
| La Couture (62136) | - | - |
| La Couture (62177) | - | - |
| La Herliere (62158) | - | - |
| La Loge (62140) | - | - |
| La Madeleine Sous Montreu (62170) | - | - |
| La Recousse (62890) | - | - |
| La Thieuloye (62130) | - | - |
| Labeuvriere (62122) | - | - |
| Labourse (62113) | - | - |
| Labroye (62140) | - | - |
| Labuissiere (62700) | - | - |
| Lacres (62830) | - | - |
| Lagnicourt Marcel (62159) | - | - |
| Laires (62960) | - | - |
| Lambres (62120) | - | - |
| Landrethun Le Nord (62250) | - | - |
| Landrethun Les Ardres (62610) | - | - |
| Lapugnoy (62122) | - | - |
| Lattre St Quentin (62810) | - | - |
| Laventie (62840) | - | - |
| Le Parcq (62770) | - | - |
| Le Ponchel (62390) | - | - |
| Le Portel (62480) | - | - |
| Le Quesnoy En Artois (62140) | - | - |
| Le Sars (62450) | - | - |
| Le Souich (62810) | - | - |
| Le Touquet Paris Plage (62520) | - | - |
| Le Transloy (62450) | - | - |
| Le Transloy (62188) | - | - |
| Le Wast (62142) | - | - |
| Lebiez (62990) | - | - |
| Lebucquiere (62124) | - | - |
| Lechelle (62124) | - | - |
| Ledinghem (62380) | - | - |
| Lefaux (62630) | - | - |
| Leforest (62790) | - | - |
| Lens (62300) | - | - |
| Lens Cedex (62301) | - | - |
| Lens Cedex (62302) | - | - |
| Lens Cedex (62303) | - | - |
| Lens Cedex (62304) | - | - |
| Lens Cedex (62305) | - | - |
| Lens Cedex (62306) | - | - |
| Lens Cedex (62307) | - | - |
| Lens Cedex (62308) | - | - |
| Lens Cedex (62309) | - | - |
| Lens Cedex (62331) | - | - |
| Lens Cedex (62332) | - | - |
| Lens Cedex (62333) | - | - |
| Lens Cedex (62334) | - | - |
| Lens Cedex (62335) | - | - |
| Lens Cedex (62336) | - | - |
| Lens Cedex (62337) | - | - |
| Lens Cedex (62338) | - | - |
| Lens Cedex (62339) | - | - |
| Lepine (62170) | - | - |
| Les Attaques (62730) | - | - |
| Lespesses (62190) | - | - |
| Lespinoy (62990) | - | - |
| Lestrem (62136) | - | - |
| Leubringhen (62250) | - | - |
| Leulinghem (62500) | - | - |
| Leulinghen Bernes (62250) | - | - |
| Libercourt (62820) | - | - |
| Licques (62850) | - | - |
| Liencourt (62810) | - | - |
| Lieres (62190) | - | - |
| Liettres (62145) | - | - |
| Lievin (62800) | - | - |
| Lignereuil (62810) | - | - |
| Ligny Les Aire (62960) | - | - |
| Ligny St Flochel (62127) | - | - |
| Ligny St Flochel (62168) | - | - |
| Ligny Sur Canche (62270) | - | - |
| Ligny Thilloy (62450) | - | - |
| Lillers (62190) | - | - |
| Linghem (62120) | - | - |
| Linzeux (62270) | - | - |
| Lisbourg (62134) | - | - |
| Locon (62400) | - | - |
| Loison Sous Lens (62218) | - | - |
| Loison Sur Crequoise (62990) | - | - |
| Longfosse (62240) | - | - |
| Longuenesse (62219) | - | - |
| Longueville (62142) | - | - |
| Longvillers (62630) | - | - |