| Code | Name | Region |
|---|---|---|
| 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 |
| USHPE | Shepherd | TX |
| US8ST | Shepherdstown | WV |
| USSQN | Shepherdsville | KY |
| USXSX | Sheppard | TX |
| US9SP | Sheppton | PA |
| USZSO | Sherborn | MA |
| USSRR | Sherburne | NY |
| USSIW | Sheridan | AR |
| USSDV | Sheridan | CO |
| US5SD | Sheridan | IL |
| USSD9 | Sheridan | IN |
| USSJX | Sheridan | MI |
| USSRD | Sheridan | NY |
| USSJG | Sheridan | OR |
| USSHR | Sheridan | WY |
| USXMP | Sherman | CT |
| USSZM | Sherman | MS |
| USDZZ | Sherman | NY |
| USSXP | Sheldon Point | AK |
| USSQK | Sheldon Springs | VT |