| population | |
| Acquin-Westbecourt | 814 |
| Affringues | 226 |
| Aire-sur-la-Lys | 9859 |
| Alquines | 1007 |
| Arques | 9852 |
| Audincthun | 657 |
| Audrehem | 560 |
| Avroult | 606 |
| Bayenghem-les-Eperlecques | 1013 |
| Bayenghem-les-Seninghem | 324 |
| Beaumetz-les-Aire | 240 |
| Bellinghem | 1073 |
| Blendecques | 5022 |
| Blequin | 516 |
| Boisdinghem | 247 |
| Bomy | 623 |
| Bonningues-les-Ardres | 665 |
| Bouvelinghem | 210 |
| Campagne-les-Wardrecques | 1223 |
| Clairmarais | 634 |
| Clerques | 320 |
| Clety | 757 |
| Coulomby | 735 |
| Coyecques | 595 |
| Delettes | 1174 |
| Dennebrœucq | 385 |
| Dohem | 832 |
| Ecques | 2120 |
| Elnes | 935 |
| Enquin-lez-Guinegatte | 1611 |
| population | |
| Eperlecques | 3582 |
| Erny-Saint-Julien | 328 |
| Escœuilles | 478 |
| Esquerdes | 1617 |
| Fauquembergues | 991 |
| Febvin-Palfart | 596 |
| Flechin | 485 |
| Hallines | 1206 |
| Haut-Loquin | 188 |
| Helfaut | 1669 |
| Heuringhem | 1329 |
| Houlle | 1107 |
| Journy | 283 |
| Laires | 363 |
| Ledinghem | 335 |
| Leulinghem | 248 |
| Longuenesse | 11029 |
| Lumbres | 3685 |
| Mametz | 1991 |
| Mentque-Nortbecourt | 658 |
| Merck-Saint-Lievin | 654 |
| Moringhem | 550 |
| Moulle | 1110 |
| Nielles-les-Blequin | 826 |
| Nordausques | 1235 |
| Nort-Leulinghem | 217 |
| Ouve-Wirquin | 509 |
| Pihem | 957 |
| Quelmes | 575 |
| Quercamps | 263 |
| population | |
| Quiestede | 608 |
| Racquinghem | 2296 |
| Rebergues | 379 |
| Reclinghem | 246 |
| Remilly-Wirquin | 343 |
| Renty | 646 |
| Roquetoire | 1948 |
| Saint-Augustin | 799 |
| Saint-Martin-d'Hardinghem | 284 |
| Saint-Martin-lez-Tatinghem | 5897 |
| Saint-Omer | 14443 |
| Salperwick | 495 |
| Seninghem | 737 |
| Serques | 1147 |
| Setques | 608 |
| Surques | 645 |
| Therouanne | 1135 |
| Thiembronne | 849 |
| Tilques | 1107 |
| Tournehem-sur-la-Hem | 1454 |
| Vaudringhem | 545 |
| Wardrecques | 1331 |
| Wavrans-sur-l'Aa | 1286 |
| Wismes | 483 |
| Wisques | 229 |
| Wittes | 937 |
| Wizernes | 3317 |
| Zouafques | 625 |
| Zudausques | 890 |
 | Calais-Dunkerque Airport | ~ 32.33 km |
| Merville-Calonne Airport | ~ 34.90 km |
| Le Touquet-Côte d'Opale Airport | ~ 43.69 km |
| Lille-Lesquin Airport | ~ 66.81 km |
 | Wevelgem Airport | ~ 74.16 km |
| Ostend-Bruges International Airport | ~ 74.22 km |
| Albert-Bray Airport | ~ 89.74 km |
 | Lydd Airport | ~ 90.60 km |
| St Aubin Airport | ~ 119.28 km |
