| -S- | -T- | |
| St. Helena | Sierra Leone | Tanzania |
| St. Kitts & Nevis | Singapore | Thailand |
| St. Lucia | Slovakia | Togo |
| St Maarten | Slovenia | Trinidad & Tobago |
| St. Pierre & Miquelon | Solomon Islands | Tristan da Cunha |
| St. Thomas & Prince | Somalia | Tunisia |
| St. Vincent | Somali Coast | Turkey |
| St. Vincent & Grenadines | South Africa | Turkey in Asia |
| San Marino | South Georgia & South Sandwich Is. | Turkey - Northern Cyprus |
| Saudia Arabia - Hejaz & Nejd | South West Africa | Turks & Caicos |
| Saudia Arabia - Nejd | Spain | Tuvalu |
| Saudi Arabia | Sri Lanka | |
| Senegal | Suriname | |
| Serbia & Montenegro | Sweden | |
| Seychelles | Switzerland | |
| Seychelles - Zil Elwagne Sesel | Syria - Arabian Gov't | |
| Syria |
Promoting collecting lighthouses on stamps and related items
