| Code | Name | Region |
|---|---|---|
| CHTSA | Trubschachen | BE |
| CHTSC | Tschiertschen | GR |
| CHTUB | Tubach | SG |
| CHTUG | Tuggen | SZ |
| CHTUR | Turbenthal | ZH |
| CHTGF | Tegerfelden | AG |
| CHTEN | Tenero | TI |
| CHTNK | Tenniken | BL |
| CHTTL | Tentlingen | FR |
| CHTMN | Termen | VS |
| CHTFN | Teufen | AR |
| CHTEU | Teufenthal | AG |
| CHTHL | Thal | SG |
| CHTHI | Thalheim | AG |
| CHTWL | Thalwil | ZH |
| CHTHA | Thayngen | SH |
| CHTHW | Therwil | BL |
| CHTNX | Thonex | GE |
| CHTRG | Thorigen | BE |
| CHCHT | Thorishaus | BE |
| CHTHU | Thun | BE |
| CHTHD | Thundorf | TG |
| CHTHR | Thurnen | BL |
| CHTHS | Thusis | GR |
| CHTOB | Tobel | TG |
| CHSOK | Stusslingen | SO |
| CHSBE | Suberg | BE |
| CHSBI | Subingen | SO |
| CHSCY | Suchy | JU |
| CHSUG | Sugiez | FR |
| CHHSR | Suhr | AG |
| CHSGE | Sulgen | TG |
| CHSVD | Sullens | VD |
| CHSMW | Sumiswald | BE |
| CHSUR | Sursee | LU |
| CHSSC | Susch | GR |
| CHSUT | Sutz-lattrigen | BE |
| CHTAF | Tafers | FR |
| CHTWG | Tagelswangen | ZH |
| CHTGC | Tagerschen | TG |
| CHTWN | Tagerwilen | TG |
| CHTGN | Tartegnin | VD |
| CHTAR | Taufen | AR |
| CHTVS | Tavannes | BE |
| CHTVR | Taverne | TI |
| CHSTK | Stallikon | ZH |
| CHSAN | Stans | NW |
| CHSTA | Stansstad | NW |
| CHSTC | Steckborn | TG |
| CHSBG | Steffisburg | BE |