List of all settlements:
- Acquin-Westbécourt, Saint-Omer
- Affringues, Saint-Omer
- Aire-sur-la-Lys, Saint-Omer
- Alquines, Saint-Omer
- Ardres, Saint-Omer
- Arques, Saint-Omer
- Audincthun, Saint-Omer
- Audrehem, Saint-Omer
- Audruicq, Saint-Omer
- Autingues, Saint-Omer
- Avroult, Saint-Omer
- Balinghem, Saint-Omer
- Bayenghem-lès-Éperlecques, Saint-Omer
- Bayenghem-lès-Seninghem, Saint-Omer
- Beaumetz-lès-Aire, Saint-Omer
- Blendecques, Saint-Omer
- Bléquin, Saint-Omer
- Boisdinghem, Saint-Omer
- Bomy, Saint-Omer
- Bonningues-lès-Ardres, Saint-Omer
- Bouvelinghem, Saint-Omer
- Brêmes, Saint-Omer
- Campagne-lès-Wardrecques, Saint-Omer
- Clairmarais, Saint-Omer
- Clarques, Saint-Omer
- Clerques, Saint-Omer
- Cléty, Saint-Omer
- Coulomby, Saint-Omer
- Coyecques, Saint-Omer
- Delettes, Saint-Omer
- Dennebroeucq, Saint-Omer
- Dohem, Saint-Omer
- Ecques, Saint-Omer
- Elnes, Saint-Omer
- Enguinegatte, Saint-Omer
- Enquin-les-Mines, Saint-Omer
- Éperlecques, Saint-Omer
- Erny-Saint-Julien, Saint-Omer
- Escoeuilles, Saint-Omer
- Esquerdes, Saint-Omer
- Fauquembergues, Saint-Omer
- Febvin-Palfart, Saint-Omer
- Fléchin, Saint-Omer
- Guemps, Saint-Omer
- Hallines, Saint-Omer
- Haut-Loquin, Saint-Omer
- Helfaut, Saint-Omer
- Herbelles, Saint-Omer
- Heuringhem, Saint-Omer
- Houlle, Saint-Omer
- Inghem, Saint-Omer
- Journy, Saint-Omer
- Laires, Saint-Omer
- Landrethun-lès-Ardres, Saint-Omer
- Ledinghem, Saint-Omer
- Leulinghem, Saint-Omer
- Longuenesse, Saint-Omer
- Louches, Saint-Omer
- Lumbres, Saint-Omer
- Mametz, Saint-Omer
- Mentque-Nortbécourt, Saint-Omer
- Merck-Saint-Liévin, Saint-Omer
- Moringhem, Saint-Omer
- Moulle, Saint-Omer
- Muncq-Nieurlet, Saint-Omer
- Nielles-lès-Ardres, Saint-Omer
- Nielles-lès-Bléquin, Saint-Omer
- Nordausques, Saint-Omer
- Nort-Leulinghem, Saint-Omer
- Nortkerque, Saint-Omer
- Nouvelle-Église, Saint-Omer
- Offekerque, Saint-Omer
- Ouve-Wirquin, Saint-Omer
- Oye-Plage, Saint-Omer
- Pihem, Saint-Omer
- Polincove, Saint-Omer
- Quelmes, Saint-Omer
- Quercamps, Saint-Omer
- Quiestède, Saint-Omer
- Racquinghem, Saint-Omer
- Rebecques, Saint-Omer
- Rebergues, Saint-Omer
- Reclinghem, Saint-Omer
- Recques-sur-Hem, Saint-Omer
- Remilly-Wirquin, Saint-Omer
- Renty, Saint-Omer
- Rodelinghem, Saint-Omer
- Roquetoire, Saint-Omer
- Ruminghem, Saint-Omer
- Saint-Folquin, Saint-Omer
- Saint-Martin-au-Laërt, Saint-Omer
- Saint-Martin-d'Hardinghem, Saint-Omer
- Saint-Omer, Saint-Omer
- Saint-Omer-Capelle, Saint-Omer
- Sainte-Marie-Kerque, Saint-Omer
- Salperwick, Saint-Omer
- Seninghem, Saint-Omer
- Serques, Saint-Omer
- Setques, Saint-Omer
- Surques, Saint-Omer
- Tatinghem, Saint-Omer
- Thérouanne, Saint-Omer
- Thiembronne, Saint-Omer
- Tilques, Saint-Omer
- Tournehem-sur-la-Hem, Saint-Omer
- Vaudringhem, Saint-Omer
- Vieille-Église, Saint-Omer
- Wardrecques, Saint-Omer
- Wavrans-sur-l'Aa, Saint-Omer
- Wismes, Saint-Omer
- Wisques, Saint-Omer
- Wittes, Saint-Omer
- Wizernes, Saint-Omer
- Zouafques, Saint-Omer
- Zudausques, Saint-Omer
- Zutkerque, Saint-Omer