word | | Nationality |
| Romanian | Romania | noun: Romanian(s) adjective: Romanian |
| Russian | Russia | noun: Russian(s) adjective: Russian |
| Rwandan | Rwanda | noun: Rwandan(s) adjective: Rwandan |
| Sahraoui | Western Sahara | noun: Sahrawi(s), Sahraoui(s) adjective: Sahrawi, Sahrawian, Sahraouian |
| Sahraouian | Western Sahara | noun: Sahrawi(s), Sahraoui(s) adjective: Sahrawi, Sahrawian, Sahraouian |
| Sahrawi | Western Sahara | noun: Sahrawi(s), Sahraoui(s) adjective: Sahrawi, Sahrawian, Sahraouian |
| Sahrawian | Western Sahara | noun: Sahrawi(s), Sahraoui(s) adjective: Sahrawi, Sahrawian, Sahraouian |
| Saint | Saint Helena | noun: Saint Helenian(s) adjective: Saint Helenian note: referred to locally as "Saints" |
| Saint | Saint Lucia | noun: Saint Lucian(s) adjective: Saint Lucian |
| Saint | Saint Vincent and the Grenadines | noun: Saint Vincentian(s) or Vincentian(s) adjective: Saint Vincentian or Vincentian |
| Saints | Saint Helena | noun: Saint Helenian(s) adjective: Saint Helenian note: referred to locally as "Saints" |
| Salvadoran | El Salvador | noun: Salvadoran(s) adjective: Salvadoran |
| Sammarinese | San Marino | noun: Sammarinese (singular and plural) adjective: Sammarinese |
| Samoan | American Samoa | noun: American Samoan(s) (US nationals) adjective: American Samoan |