| Spanish West Indies |
|
| Sri Lanka |
|
| St. Kitts |
|
| Stellaland |
|
| Straits Settlements |
|
| Sudan |
|
| Sudan- Revenue Stamps |
|
| Sudetenland |
|
| Sungei Ujong |
|
| Suriname |
|
| Svalbard (Spitzbergen) |
|
| Svalbard and Jan Mayen |
|
| Swaziland |
|
| Sweden |
|
| Switzerland |
|
| Switzerland- Revenue Stamps |
|
| Syria |
|
| Tahiti |
|
| Taiwan (Republic of China) |
|
| Tajikistan |
|