| Code | Name | Region |
|---|---|---|
| USSLY | Sealy | TX |
| USSRC | Searcy | AR |
| USSL5 | Searles | CA |
| USS3S | Sears | MI |
| USJUR | Searsburg | VT |
| USSM4 | Searsmont | ME |
| USSRP | Searsport | ME |
| USXLU | Seaside | CA |
| USOZG | Scottsburg | VA |
| USSTZ | Scottsdale | AZ |
| USSCV | Scottsville | KY |
| USOTV | Scottsville | NY |
| USSZF | Scottsville | TX |
| USTTS | Scottsville | VA |
| USSCN | Scottville | MI |
| USRRA | Scranton | AR |
| USS53 | Scranton | IA |
| USDCN | Scranton | ND |
| USSCR | Scranton | PA |
| USSCB | Scribner | NE |
| US7OL | Sea Cliff | NY |
| USGXI | Sea Girt | NJ |
| USQSI | Sea Island | GA |
| USSK8 | Seabeck | WA |
| USS7B | Seaboard | NC |
| USEBK | Seabrook | NH |
| USSBJ | Seabrook | NJ |
| USEQQ | Seabrook | SC |
| USSOA | Scotia | NY |
| US9SD | Scotland | PA |
| USSO2 | Scotland | SD |
| USSCD | Scotland Neck | NC |
| USZKO | Scott | LA |
| USXOT | Scott | MS |
| USSB3 | Scott Air Force Base | IL |
| USZSN | Scott City | KS |
| USSCQ | Scott City | MO |
| USDZQ | Scott Depot | WV |
| USS7M | Scott Mills | OR |
| USTW6 | Scott Township | PA |
| USSZD | Scottdale | GA |
| USSZE | Scottdale | PA |
| USXOS | Scotts | MI |
| USS4H | Scotts Hill | TN |
| USSV4 | Scotts Valley | CA |
| USBFF | Scottsbluff | NE |
| USSQB | Scottsboro | AL |
| USSSZ | Scottsburg | IN |
| USS9C | Schriever | LA |
| USSBW | Schulenburg | TX |