| Code | Name | Region |
|---|---|---|
| USHQS | Shoshone | CA |
| USOHZ | Shoshone | ID |
| USGL5 | Shoshone County | ID |
| USSN4 | Shoshoni | WY |
| USSOW | Show Low | AZ |
| USSIH | Showell | MD |
| USSKO | Showhegan | ME |
| USOHS | Shreve | OH |
| USS3O | Shingletown | CA |
| USSKF | Shinnston | WV |
| USSBQ | Ship Bottom | NJ |
| USIPX | Ship Island | MS |
| USSSG | Shippensburg | PA |
| USYNV | Shippenville | PA |
| USZHP | Shippingport | PA |
| USS2P | Shipshewana | IN |
| USSVF | Shiremanstown | PA |
| USSJR | Shirley | MA |
| USWSH | Shirley | NY |
| USSB6 | Shirleysburg | PA |
| USSHH | Shishmaref | AK |
| USIVE | Shively | KY |
| USHCB | Shoal Cove | AK |
| USYHZ | Shoals | IN |
| USKVM | Shoemakersville | PA |
| USH78 | Shohola | PA |
| USXSA | Shokan | NY |
| USRC5 | Shoreacres | TX |
| USSHP | Sherman | TX |
| USSJJ | Sherman Oaks | CA |
| USPNX | Sherman-denison | TX |
| USSML | Shermans Dale | PA |
| USSJK | Sherrard | IL |
| USRL8 | Sherrill | AR |
| USRRI | Sherrill | NY |
| USS2F | Sherrills Ford | NC |
| USYRW | Sherwood | AR |
| USS3W | Sherwood | MI |
| USSHW | Sherwood | ND |
| USSJU | Sherwood | OR |
| USSR7 | Sherwood | WI |
| USSVB | Shickshinny | PA |
| USIDK | Shidler | OK |
| USILH | Shiloh | IL |
| USOYJ | Shiloh | NJ |
| USVVO | Shiloh | OH |
| USINR | Shiner | TX |
| USXSH | Shingle Springs | CA |
| USEFH | Shepherd | MI |
| USHHD | Shepherd | MT |