| Saint-Aubin | GSB |  |
| Saint-Bossu | FSB | |
| Saint-Cécile | GCE | |
| Saint-Denis-Bovesse | MD | |
| Saint-Genois-Helchin | LGO | |
| Saint-Gérard | MGE | |
| Saint-Ghislain | FGH | |
| Saint-Ghislain-Hornu | FGH | |
| Saint-Jean-Geest | FSJ | |
| Saint-Lambert | GLB | |
| Saint-Marie-sur-Semois | MSR | |
| Saint-Maur | |
|
| Saint-Médard | MSD | |
| Saint-Rémy | |
|
| Saint-Vincent-Bellefontaine | MBF | |
| Saintes | FSA | |
| Sainval | |
|
| Salmchâteau | |
|
| Sankt-Vith | RSV | |
| Sarolay | |
|
| Sart-Bernard | SB | |
| Sart-lez-Moines | |
|
| Sart-lez-Spa | FZP | |
| Sart-Moulin | LNU | |
| Sauheid | |
|
| Sauvegarde | FSV | |
| Sauvenière | MSV | |
| Schaarbeek | FSR | |
| Schaarbeek | FSR | |
| Schaarbeek | FSR | |
| Schaarbeek-Josaphat | GSJ | |
| Schaffen | LAF | |
| Scheldewindeke | FSK | |
| Schelle | FC | |
| Schellebelle | FCB | |
| Schendelbeke | FED | |
| Scherpenheuvel | GMG | |
| Schoonaarde | FAD | |
| Schravenhage | |
|
| Schulen | GSU | |
| Sclaigneuax | NS | |
| Sclessin | NSN | |
| Scry | SCRY | |
| Sélange | |
|
| Seloignes | LOI | |
| Seneffe | LSF | |
| Senenne | |
|
| Senzeille | GSN | |
| Seraing | NSR | |
| Serskamp | NSK | |
| Sibret | MSB | |
| Signeulx | MSG | |
| Sijsele | LYE | |
| Silenrieux | GSL | |
| Silly | FIL | |
| Simonis | SIM | |
| Sinaai | LSW | |
| Sint Martens Voeren | GFM | |
| Sint-Agatha-Berchem | FBSG | |
| Sint-Amands | LSP | |
| Sint-Denijs-Boekel | FNZ | |
| Sint-Denijs-Boekel-Nederzwalm | FNZ | |
| Sint-Denijs-Helchin | LGO | |
| Sint-Denijs-Westrem | FPW | |
| Sint-Eloois-Vijver | MYV | |
| Sint-Genesius-Rode | FGO | |
| Sint-Genesius-Rode | FHO | |
| Sint-Gillis (Dendermonde) | FSI | |
| Sint-Gillis-Waas | FSI | |
| Sint-Huibrechts-Lille | GLH | |
| Sint-Job | GSO | |
| Sint-Joris-Weert | GWS | |
| Sint-Joris-Weert | GSW | |
| Sint-Jozef | |
|
| Sint-Katelijne-Waver | FWA | |
| Sint-Katerine | |
|
| Sint-Lambrechts-Herk | |
|
| Sint-Maria-Lierde | FRD | |
| Sint-Maria-Oudenhove | |
|
| Sint-Mariaburg | MRB | |
| Sint-Mariaburg | GSM | |
| Sint-Martens-Bodegem | FBSM | |
| Sint-Martens-Bodegem | FSMB | |
| Sint-Michiels | |
|
| Sint-Niklaas | FSN | |
| Sint-Niklaas-West | FSNT | |
| Sint-Pauwels | |
|
| Sint-Truiden | FST | |
| Sirault | LST | |
| Sivry | LYV | |
| Sleidinge | LSD | |
| Snaaskerke | FKN | |
| Soignies | FSG | |
| Soignies-Carrières | FSGC | |
| Solre-saint-Géry | LSO | |
| Solre-sur-Sambre | NSS | |
| Sombeke | |
|
| Sombreffe | FMF | |
| Sosoye | |
|
| Soudromont | |
|
| Sourbrodt | RMS | |
| Souverein Pré | |
|
| Souvrerein Wandre | |
|
| Sovet | |
|
| Spa | FSS | |
| Spa-Géronstère | FSSG | |
| Spalbeek | |
|
| Spontin | MSP | |
| Spontin-Sources | |
|
| Staakte | |
|
| Staden | GSA | |
| Stambruges | LSS | |
| Stasegem | MSE | |
| Statte | LHY | |
| Stave | MSA | |
| Stavelot | FVO | |
| Steenbrugge | FSBG | |
| Steene | |
|
| Steenhuffel | FSF | |
| Stéhoux | |
|
| Steinebruck | RMK | |
| Stekene | FKT | |
| Sterhoek | |
|
| Sterpenich | MS | |
| Stockem | MKM | |
| Stoumont | MSO | |
| Straimont | MST | |
| Strée | LTR | |
| Streupas | |
|
| Strichon | |
|
| Sy | SY | |