| Code | Name | Region |
|---|---|---|
| USVSV | Sheldonville | MA |
| USEOB | Shell Knob | MO |
| USHL8 | Shell Lake | WI |
| USSR2 | Shell Rock | IA |
| USSHZ | Shelley | ID |
| USXMC | Shellman | GA |
| USS8H | Shelocta | PA |
| USXSI | Shelter Island | NY |
| USHDH | Shelter Island Heights | NY |
| USSQR | Shelton | CT |
| USJLT | Shelton | NE |
| USSHN | Shelton | WA |
| USSYA | Shemya | AK |
| USUYS | Shenandoah | GA |
| USSDH | Shenandoah | IA |
| USDOH | Shenandoah | TX |
| USSZH | Shenandoah | VA |
| USSJ8 | Shenandoah Junction | WV |
| USINH | Shelby | IN |
| USSDL | Shelby | MI |
| USSBX | Shelby | MT |
| USSEY | Shelby | NC |
| USNE5 | Shelby | NE |
| USSBI | Shelby | OH |
| USW7W | Shelby | WI |
| USSN8 | Shelby Township | MI |
| USSBV | Shelbyville | IL |
| USSYH | Shelbyville | IN |
| USSVZ | Shelbyville | KY |
| USQYV | Shelbyville | MI |
| USSQG | Shelbyville | MO |
| USSYI | Shelbyville | TN |
| USIYE | Shelbyville | TX |
| USSEI | Sheldon | IA |
| USSQP | Sheldon | MO |
| USXMB | Sheldon | TX |
| US7SH | Sheldon | VT |
| USZ4X | Sheldon | WI |
| USSHC | Shawnee | KS |
| USSNL | Shawnee | OK |
| USSM2 | Shawnee Mission | KS |
| US8SD | Shawnee On Delaware | PA |
| USSBM | Sheboygan | WI |
| USSBF | Sheboygan Falls | WI |
| USYSD | Shedd | OR |
| USSMU | Sheep Mountain | AK |
| USSHF | Sheffield | AL |
| USSED | Sheffield | IA |
| US6FL | Sheffield | IL |
| USQSH | Sheffield | MA |