| Port Code | Port Name | Country |
| USSSU | White Sulphur Springs | United States |
| USSSV | Strongsville | United States |
| USSSW | Stuart Island | United States |
| USSSX | Somersworth | United States |
| USSSY | Sussex | United States |
| USSSZ | Scottsburg | United States |
| USSTA | St Albans | United States |
| USSTB | Stafford | United States |
| USSTC | St Cloud | United States |
| USSTD | Stafford | United States |
| USSTE | Stevens Point | United States |
| USSTF | Stamford | United States |
| USSTG | St George Island | United States |
| USSTH | St Helens | United States |
| USSTI | Stanton | United States |
| USSTJ | Saint Joseph | United States |
| USSTK | Sterling | United States |
| USSTL | St Louis | United States |
| USSTM | Stamps | United States |
| USSTN | Stanhope | United States |
| USSTO | Stone | United States |
| USSTP | St Paul | United States |
| USSTQ | St Marys | United States |
| USSTR | Streator | United States |
| USSTS | Santa Rosa | United States |
| USSTT | Stockertown | United States |
| USSTU | Stoneham | United States |
| USSTV | Stoneville | United States |
| USSTW | Strausstown | United States |
| USSTX | Stanton | United States |
| USSTY | Smithtown | United States |
| USSTZ | Scottsdale | United States |
| USSUA | Stuart | United States |
| USSUC | Sundance | United States |
| USSUD | Stroud | United States |
| USSUE | Sturgeon Bay | United States |
| USSUF | Suffolk | United States |
| USSUG | Sulligent | United States |
| USSUH | Summerhill | United States |
| USSUI | South Holland | United States |
| USSUJ | Suffern | United States |
| USSUK | Shattuck | United States |
| USSUL | Pt Sulphur | United States |
| USSUM | Stone Mountain | United States |
| USSUN | Sun Valley-Hailey Apt | United States |
| USSUN | Hailey-Sun Valley Apt | United States |
| USSUO | Sun River | United States |
| USSUP | Sutton | United States |
| USSUQ | Success | United States |
| USSUR | Sudbury | United States |
| USSUS | Spirit of St Louis Apt/St Louis | United States |
| USSUT | Sunny Point | United States |
| USSUU | Fairfield | United States |
| USSUV | Saugerties | United States |
| USSUW | Superior | United States |
| USSUX | Sioux City | United States |
| USSUY | Sunnyside | United States |
| USSUZ | Sublimity | United States |
| USSVA | Savoonga | United States |
| USSVB | Shickshinny | United States |
| USSVC | Silver City | United States |
| USSVD | Sunnyvale | United States |
| USSVE | Susanville | United States |
| USSVF | Shiremanstown | United States |
| USSVG | Suwanee | United States |
| USSVH | Statesville | United States |
| USSVI | Seagoville | United States |
| USSVJ | Severn | United States |
| USSVK | Slate Hill | United States |
| USSVL | Schererville | United States |
| USSVM | Slater | United States |
| USSVN | Severn | United States |
| USSVO | Summitville | United States |
| USSVP | Slatington | United States |
| USSVQ | Southaven | United States |
| USSVR | Silver Springs | United States |
| USSVS | Stevens Village | United States |
| USSVT | Slippery Rock | United States |
| USSVU | Sevierville | United States |
| USSVV | Stevensville | United States |
| USSVW | Sparrevohn | United States |
| USSVX | Stoneville | United States |
| USSVY | Sun Valley | United States |
| USSVZ | Shelbyville | United States |
| USSWA | Swanton | United States |
| USSWB | Sebewaing | United States |
| USSWC | Sandwich | United States |
| USSWD | Seward | United States |
| USSWE | Sunset Whitney Ranch | United States |
| USSWF | Newburgh | United States |
| USSWG | Sweet Grass | United States |
| USSWH | Sandwich | United States |
| USSWI | Swissvale | United States |
| USSWJ | Swainsboro | United States |
| USSWK | Seekonk | United States |
| USSWL | Stonewall | United States |
| USSWN | Sewaren | United States |
| USSWO | Stillwater | United States |
| USSWQ | Swanton | United States |
| USSWR | Sawyer | United States |