| Country | Capital |
| Seychelles | name: Victoria geographic coordinates: 4 38 S, 55 27 E time difference: UTC+4 (9 hours ahead of Washington, DC during Standard Time) |
| Sierra Leone | name: Freetown geographic coordinates: 8 30 N, 13 15 W time difference: UTC 0 (5 hours ahead of Washington, DC during Standard Time) |
| Singapore | name: Singapore geographic coordinates: 1 17 N, 103 51 E time difference: UTC+8 (13 hours ahead of Washington, DC during Standard Time) |
| Slovakia | name: Bratislava geographic coordinates: 48 09 N, 17 07 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Slovenia | name: Ljubljana geographic coordinates: 46 03 N, 14 31 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Solomon Islands | name: Honiara geographic coordinates: 9 26 S, 159 57 E time difference: UTC+11 (16 hours ahead of Washington, DC during Standard Time) |
| Somalia | name: Mogadishu geographic coordinates: 2 04 N, 45 22 E time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) |
| South Africa | name: Pretoria (administrative capital) geographic coordinates: 25 42 S, 28 13 E time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) note: Cape Town (legislative capital); Bloemfontein (judicial capital) |
| South Georgia and the South Sandwich Islands | void |
| Southern Ocean | void |
| Spain | name: Madrid geographic coordinates: 40 24 N, 3 41 W time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October note: Spain is divided into two time zones including the Canary Islands |
| Spratly Islands | void |
| Sri Lanka | name: Colombo geographic coordinates: 6 56 N, 79 51 E time difference: UTC+5.5 (10.5 hours ahead of Washington, DC during Standard Time) note: Sri Jayewardenepura Kotte (legislative capital) |
| Sudan | name: Khartoum geographic coordinates: 15 36 N, 32 32 E time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) |
| Suriname | name: Paramaribo geographic coordinates: 5 50 N, 55 10 W time difference: UTC-3 (2 hours ahead of Washington, DC during Standard Time) |
| Svalbard | name: Longyearbyen geographic coordinates: 78 13 N, 15 33 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Swaziland | name: Mbabane geographic coordinates: 26 18 S, 31 06 E time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) note: Lobamba (royal and legislative capital) |
| Sweden | name: Stockholm geographic coordinates: 59 20 N, 18 03 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Switzerland | name: Bern geographic coordinates: 46 57 N, 7 26 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Syria | name: Damascus geographic coordinates: 33 30 N, 36 18 E time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins 1 April; ends 30 September |
| Taiwan | name: Taipei geographic coordinates: 25 03 N, 121 30 E time difference: UTC+8 (13 hours ahead of Washington, DC during Standard Time) |
| Tajikistan | name: Dushanbe geographic coordinates: 38 35 N, 68 48 E time difference: UTC+5 (10 hours ahead of Washington, DC during Standard Time) |
| Tanzania | name: Dar es Salaam geographic coordinates: 6 48 S, 39 17 E time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) note: legislative offices have been transferred to Dodoma, which is planned as the new national capital; the National Assembly now meets there on a regular basis |
| Thailand | name: Bangkok geographic coordinates: 13 45 N, 100 31 E time difference: UTC+7 (12 hours ahead of Washington, DC during Standard Time) |
| Timor-Leste | name: Dili geographic coordinates: 8 35 S, 125 36 E time difference: UTC+9 (14 hours ahead of Washington, DC during Standard Time) |
| Togo | name: Lome geographic coordinates: 6 08 N, 1 13 E time difference: UTC 0 (5 hours ahead of Washington, DC during Standard Time) |