word | | Country name |
| form | Saint Helena | conventional long form: Saint Helena, Ascension, and Tristan da Cunha conventional short form: none |
| form | Saint Kitts and Nevis | conventional long form: Federation of Saint Kitts and Nevis conventional short form: Saint Kitts and Nevis former: Federation of Saint Christopher and Nevis |
| form | Saint Lucia | conventional long form: none conventional short form: Saint Lucia |
| form | Saint Martin | conventional long form: Overseas Collectivity of Saint Martin conventional short form: Saint Martin local long form: Collectivity d'outre mer de Saint-Martin local short form: Saint-Martin |
| form | Saint Pierre and Miquelon | conventional long form: Territorial Collectivity of Saint Pierre and Miquelon conventional short form: Saint Pierre and Miquelon local long form: Departement de Saint-Pierre et Miquelon local short form: Saint-Pierre et ... |
| form | Saint Vincent and the Grenadines | conventional long form: none conventional short form: Saint Vincent and the Grenadines |
| form | Samoa | conventional long form: Independent State of Samoa conventional short form: Samoa local long form: Malo Sa'oloto Tuto'atasi o Samoa local short form: Samoa former: Western Samoa |
| form | San Marino | conventional long form: Republic of San Marino conventional short form: San Marino local long form: Repubblica di San Marino local short form: San Marino |
| form | Sao Tome and Principe | conventional long form: Democratic Republic of Sao Tome and Principe conventional short form: Sao Tome and Principe local long form: Republica Democratica de Sao Tome e Principe local short form: Sao Tome ... |
| form | Saudi Arabia | conventional long form: Kingdom of Saudi Arabia conventional short form: Saudi Arabia local long form: Al Mamlakah al Arabiyah as Suudiyah local short form: Al Arabiyah as Suudiyah |