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 |
|---|---|---|---|---|
| South Sudan | SS | SSD | 728 | ISO 3166-2:SS |
| Spain | ES | ESP | 724 | ISO 3166-2:ES |
| Sri Lanka | LK | LKA | 144 | ISO 3166-2:LK |
| Sudan | SD | SDN | 729 | ISO 3166-2:SD |
| Suriname | SR | SUR | 740 | ISO 3166-2:SR |
| Svalbard and Jan Mayen | SJ | SJM | 744 | ISO 3166-2:SJ |
| Swaziland | SZ | SWZ | 748 | ISO 3166-2:SZ |
| Sweden | SE | SWE | 752 | ISO 3166-2:SE |
| Switzerland | CH | CHE | 756 | ISO 3166-2:CH |
| Syrian Arab Republic | SY | SYR | 760 | ISO 3166-2:SY |
| Taiwan, Province of China | TW | TWN | 158 | ISO 3166-2:TW |
| Tajikistan | TJ | TJK | 762 | ISO 3166-2:TJ |
| Tanzania, United Republic of | TZ | TZA | 834 | ISO 3166-2:TZ |
| Thailand | TH | THA | 764 | ISO 3166-2:TH |
| Timor-Leste | TL | TLS | 626 | ISO 3166-2:TL |