ISO 3166-1 Officially assigned code elements Officially assigned code elements

| English_short_name_upper_lower_case | Alpha_2_code | Alpha_3_code | Numeric_code | ISO_3166_2_codes |
|---|---|---|---|---|
| San Marino | SM | SMR | 674 | ISO 3166-2:SM |
| Sao Tome and Principe | ST | STP | 678 | ISO 3166-2:ST |
| Saudi Arabia | SA | SAU | 682 | ISO 3166-2:SA |
| Senegal | SN | SEN | 686 | ISO 3166-2:SN |
| Serbia | RS | SRB | 688 | ISO 3166-2:RS |
| Seychelles | SC | SYC | 690 | ISO 3166-2:SC |
| Sierra Leone | SL | SLE | 694 | ISO 3166-2:SL |
| Singapore | SG | SGP | 702 | ISO 3166-2:SG |
| Sint Maarten (Dutch part) | SX | SXM | 534 | ISO 3166-2:SX |
| Slovakia | SK | SVK | 703 | ISO 3166-2:SK |
| Slovenia | SI | SVN | 705 | ISO 3166-2:SI |
| Solomon Islands | SB | SLB | 90 | ISO 3166-2:SB |
| Somalia | SO | SOM | 706 | ISO 3166-2:SO |
| South Africa | ZA | ZAF | 710 | ISO 3166-2:ZA |
| South Georgia and the South Sandwich Islands | GS | SGS | 239 | ISO 3166-2:GS |