| Code | Name | Region |
|---|---|---|
| USHEI | Sheffield | OH |
| USS5D | Sheffield | PA |
| US7SE | Sheffield | VT |
| USSL9 | Sheffield Lake | OH |
| USHFG | Sheffield Village | OH |
| USSB8 | Shelburne | VT |
| USHFS | Shelburne Falls | MA |
| USISY | Shelby | IA |
| USCXZ | Sharon Center | OH |
| USSHL | Sharon Hill | PA |
| USSHS | Sharon Springs | NY |
| USXMA | Sharonville | OH |
| USS22 | Sharpes | FL |
| US3SG | Sharpsburg | KY |
| USRPB | Sharpsburg | NC |
| USS7G | Sharpsburg | PA |
| USI9H | Sharpsville | IN |
| USSJS | Sharpsville | PA |
| USSL8 | Shartlesville | PA |
| US4SC | Shasta | CA |
| USS9K | Shasta Lake | CA |
| USSUK | Shattuck | OK |
| US2SL | Shaver Lake | CA |
| USS9V | Shavertown | PA |
| USJXS | Shaw | MS |
| USZFH | Shaw Air Force Base | SC |
| USSWS | Shawano | WI |
| USUSM | Shawmut | ME |
| USSR4 | Shalimar | FL |
| USSLX | Shallotte | NC |
| USS9H | Shallowater | TX |
| USYSH | Shamokin | PA |
| USSH4 | Shamong | NJ |
| USSR5 | Shamrock, Wheeler | TX |
| USJHD | Shandon | CA |
| USDOZ | Shandon | OH |
| USNRI | Shangri-la | OK |
| USAZK | Shannock | RI |
| USSHO | Shannon | GA |
| USS7N | Shannon | IL |
| USSZN | Shannon | MS |
| USS2N | Shannon | NC |
| US8IG | Shapleigh | ME |
| USS7H | Sharon | CT |
| USSHM | Sharon | MA |
| USSHQ | Sharon | PA |
| USSN3 | Sharon | VT |
| USISH | Sharon | WI |
| USEYU | Seymour | TN |
| USSET | Seymour | TX |