| 斯 | sī | (phonetic); this; Slovakia; Slovak; abbr. for 斯洛伐克 |
| 斯大林 | Sī dà lín | Joseph Stalin (1879-1953), Soviet dictator |
| 斯里兰卡 | Sī lǐ lán kǎ | Sri Lanka; (formerly) Ceylon |
| 斯坦福 | Sī tǎn fú | Stanford (University) |
| 斯德哥尔摩 | Sī dé gē ěr mó | Stockholm, capital of Sweden |
| 斯文 | sī wén | refined; educate; cultured; intellectual; polite; gentle |
| 斯文 | sī wen | refined; educate; cultured; intellectual; polite; gentle |
| 斯宾诺莎 | Sī bīn nuò shā | Baruch or Benedict Spinoza (1632-1677), rationalist philosopher |
| 斯特恩 | Sī tè ēn | Stern (name) |
| 斯宾塞 | Sī bīn sè | Spencer or Spence (name) |
| 斯佩林 | sī pèi lín | Spelling (e.g. Spelling Entertainment Group) |
| 斯佩罗 | Sī pèi luó | Spero (surname) |
| 斯克里亚宾 | Sī kè lǐ yà bīn | Scriabin (composer) |
| 斯卡伯勒礁 | Sī kǎ bó lè Jiāo | Scarborough Shoal (Philippines' name for Huangyan Island) |
| 斯哥特 | Sī gē tè | Scott (name) |
| 斯图加特 | Sī tú jiā tè | Stuttgart city in southwest Germany and capital of Baden-Württemberg 巴登・符腾堡州[Ba1 deng1 · Fu2 teng2 bao3 zhou1] |
| 斯坦佛 | Sī tǎn fó | Stanford (name); Stanford University, Palo Alto, California |
| 斯坦佛大学 | Sī tǎn fó Dà xué | Stanford University, Palo Alto, California |
| 斯坦利 | Sī tǎn lì | Stanley (name) |
| 斯坦因 | Sī tǎn yīn | Stein (name); Marc Aurel Stein (1862-1943), British adventurer and archaeologist who explorer Xinjiang in early 20th century |
| 斯坦福・莱佛士 | Sī tǎn fú · Lái fó shì | Stamford Raffles (1781-1826), British statesman and founder of the city of Singapore |
| 斯坦福大学 | Sī tǎn fú Dà xué | Stanford University |
| 斯坦贝克 | Sī tǎn bèi kè | John Steinbeck (1902-1968), US novelist |
| 斯堪的纳维亚 | Sī kān dì nà wéi yà | Scandinavia |
| 斯塔西 | Sī tǎ xī | Stacy (name) |
| 斯大林主义 | Sī dà lín zhǔ yì | Stalinism |
| 斯大林格勒 | Sī dà lín gé lè | Stalingrad, former name of Volvograd 伏尔加格勒 (1925-1961) |
| 斯大林格勒战役 | Sī dà lín gé lè Zhàn yì | Battle of Stalingrad (1942-1943), decisive battle of Second World War and one of the bloodiest battles in history, when the Germans failed to take Stalingrad, were then trapped and destroyed by Soviet forces |
| 斯大林格勒会战 | Sī dà lín gé lè Huì zhàn | Battle of Stalingrad (1942-1943); also called 斯大林格勒战役 |
| 斯威士兰 | Sī wēi shì lán | Swaziland |
| 斯密 | Sī mì | Smith (name); also rendered as 史密斯 |
| 斯密约瑟 | Sī mì Yuē sè | Joseph Smith, Jr. (1805-1844), founder of the Latter Day Saint movement |
| 斯巴达 | Sī bā dá | Sparta |
| 斯巴鲁 | Sī bā lǔ | Subaru |
| 斯帕斯基 | Sī pà sī jī | Spassky (name) |
| 斯彻达尔 | Sī chè dá ěr | Stjørdal (city in Trøndelag, Norway) |
| 斯托肯立石圈 | Sī tuō kěn lì shí quān | Stonehenge stone circle |
| 斯拉夫 | Sī lā fū | Slavic |
| 斯拉夫语 | Sī lā fū yǔ | Slavic language |
| 斯捷潘 | Sī jié pān | Stepan or Stefan (name) |
| 斯摩棱斯克 | Sī mó léng sī kè | Smolensk (Russian city) |
| 斯文・海定 | Sī wén · Hǎi dìng | Sven Hedin (1865-1952), famous Swedish adventurer and archaeologist, whose 1894-1900 Central Asian expeditions uncovered Kroraina or Loulan 楼兰; also written 斯文·赫定 |
| 斯文・赫定 | Sī wén · Hè dìng | Sven Hedin (1865-1952), famous Swedish adventurer and archaeologist, whose 1894-1900 Central Asian expeditions uncovered Kroraina or Loulan 楼兰 |
| 斯普利特 | Sī pǔ lì tè | Split (city in Croatia) |
| 斯普拉特利群岛 | Sī pǔ lā Tè lì qún dǎo | Spratly islands, disputed between China, Malaysia, the Philippines, Taiwan and Vietnam; same as 南沙群岛 |
| 斯普林菲尔德 | Sī pǔ lín fēi ěr dé | Springfield |
| 斯柯达 | Sī kē dá | Škoda, Czech Republic car manufacturer, a subsidiary of Volkswagen Group |
| 斯沃琪 | Sī wò qí | Swatch (Swiss brand) |
| 斯泰恩谢尔 | Sī tài ēn xiè ěr | Steinkjær (city in Trøndelag, Norway) |
| 斯泰西 | Sī tài xī | Stacy (name) |
