| Ref |
country name |
capital |
currencies |
continent |
flag |
| SAR | SAARLAND on to the stamps | Saarbrücken | franc de la Sarre, puis Deutsche Mark, puis euro | Europe |  |
| SAK | SACHA (JAKUTIEN) (RUSSLAND) on to the stamps | Yakutsk | ruble = 100 kopecks | Asia |  |
| SKL | SACHALIN (RUSSLAND) on to the stamps | Yuzhno-Sakhalinsk | ruble = 100 kopecks | Asia |  |
| SPI | SAINT-PIERRE UND MIQUELON on to the stamps | Saint-Pierre | French franc = 100 centimes, euro = 100 cents (from 2002) | America |  |
| SAL | SALOMONINSELN on to the stamps | Honiara | Solomon Islands dollar = 100 cents | Oceania |  |
| ZAM | SAMBIA on to the stamps | Lusaka | Zambian kwacha = 100 mgwee | Africa |  |
| SAM | SAMOA on to the stamps | Apia | tala = 100 sene | Oceania |  |
| SMA | SAN MARINO on to the stamps | San Marino | lira = 100 centesimi, euro = 100 cents (from 2002) | Europe |  |
| STH | SÃO TOMÉ UND PRÍNCIPE on to the stamps | Saõ Tomé | dobra = 100 centimos | Africa |  |
| ARA | SAUDI-ARABIEN on to the stamps | Riyadh | Saudi rial = 100 piasters, Saudi rial = 100 halalas (from 1976) | Asia |  |
| SHA | SCHARDSCHA on to the stamps | Sharjah | rupee = 100 naye paise, riyal = 100 dirhams (from 1966) | Asia |  |
| SUE | SCHWEDEN on to the stamps | Stockholm | Swedish krona = 100 öre | Europe |  |
| SUI | SCHWEIZ on to the stamps | Berne | Swiss franc = 100 centimes | Europe |  |
| SEN | SENEGAL on to the stamps | Dakar | CFA franc = 100 centimes | Africa |  |
| SER | SERBIEN on to the stamps | Belgrade | Serbian dinar = 100 paras | Europe |  |
| SEY | SEYCHELLEN on to the stamps | Victoria | Seychellois rupee = 100 cents | Africa |  |
| SIE | SIERRA LEONE on to the stamps | Freetown | leone = 100 cents | Africa |  |
| ZIM | SIMBABWE on to the stamps | Harare | Zimbabwean dollar = 100 cents | Africa |  |
| SIN | SINGAPUR on to the stamps | Singapore | Singapore dollar = 100 cents | Asia |  |
| SQU | SLOWAKEI on to the stamps | Bratislava | Slovak koruna = 100 halierov | Europe |  |
| SLO | SLOWENIEN on to the stamps | Ljubljana | tolar = 100 stotin, euro = 100 cents (from 2007) | Europe |  |
| SMO | SMOLENSK (RUSSLAND) on to the stamps | Smolensk | ruble = 100 kopecks | Europe |  |
| SOI | SOMALIA on to the stamps | Mogadishu | Somali shilling = 100 centesimi | Africa |  |
| SOL | SOMALILAND on to the stamps | Hargeisa | Somaliland shilling = 100 centisimi | Africa |  |
| ESP | SPANIEN on to the stamps | Madrid | peseta = 100 centimos, euro = 100 cents (from 2002) | Europe |  |
| SRI | SRI LANKA (CEYLON) on to the stamps | Colombo | Sri Lankan rupee = 100 cents | Asia |  |
| SHE | ST. HELENA on to the stamps | Jamestown | Saint Helena pound = 100 pence | Africa |  |
| SKI | ST. KITTS on to the stamps | Basseterre | East Caribbean doillar = 100 cents | America |  |
| SLU | ST. LUCIA on to the stamps | Castries | East Caribbean dollar = 100 cents | America |  |
| SAV | ST. VINCENT on to the stamps | Kingstown | East Caribbean dollar = 100 cents | America |  |
| SVG | ST. VINCENT UND DIE GRENADINEN on to the stamps | Kingstown | East Caribbean dollar = 100 cents | America |  |
| SGB | ST. VINCENT UND DIE GRENADINEN - BEQUIA on to the stamps | Port Elizabeth | East Caribbean dollar = 100 cents | America |  |
| SGC | ST. VINCENT UND DIE GRENADINEN - CANOUAN on to the stamps | Charlestown | East Caribbean dollar = 100 cents | America |  |
| SGM | ST. VINCENT UND DIE GRENADINEN - MAYREAU on to the stamps | Old Wall | East Caribbean dollar = 100 cents | America |  |
| SGQ | ST. VINCENT UND DIE GRENADINEN - MUSTIQUE on to the stamps | | East Caribbean dollar = 100 cents | America |  |
| SGU | ST. VINCENT UND DIE GRENADINEN - UNION ISLAND on to the stamps | Clifton | East Caribbean dollar = 100 cents | America |  |
| SGY | ST. VINCENT UND DIE GRENADINEN - YOUNG ISLAND on to the stamps | Kingstown | East Caribbean dollar = 100 cents | America | |
| OMS | STAAT OMAN on to the stamps | Nizwa | Omani rial = 1000 baizas | Asia |  |
| RSA | SÜDAFRIKA (RSA) on to the stamps | Pretoria | rand = 100 cents | Africa |  |
| SUD | SUDAN on to the stamps | Khartoum | Sudanese pound = 100 piastres | Africa |  |
| GEO | SÜDGEORGIEN on to the stamps | Grytviken Harbor | pound = 100 pence | Antarctica |  |
| OSS | SÜDOSSETIEN (GEORGIEN) on to the stamps | Tskhinvali | ruble = 100 kopecks | Europe |  |
| OMA | SULTANAT OMAN on to the stamps | Muscat | Omani rial = 1000 baizas | Asia |  |
| SUR | SURINAME on to the stamps | Paramaribo | gulden = 100 cents, Surinamese dollar = 100 cents | America |  |
| SYR | SYRIEN on to the stamps | Damascus | Syrian pound = 100 piastres | Asia |  |