| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sanddalstunga | city | Iceland | 64.88 | -21.28 | 652 | 0 | |
| Saurar | city | Iceland | 64.67 | -22.12 | 147 | 0 | |
| Selhagi | city | Iceland | 64.75 | -21.30 | 918 | 0 | |
| Seljar | city | Iceland | 64.57 | -22.32 | 13 | 0 | |
| Selmóar | city | Iceland | 64.50 | -22.13 | 49 | 0 | |
| Sidhmuli | city | Iceland | 64.70 | -21.38 | 200 | 0 | |
| Sidhumuli | city | Iceland | 64.70 | -21.38 | 200 | 0 | |
| Siggusel | city | Iceland | 64.50 | -22.13 | 49 | 0 | |
| Sigmundarstadhir | city | Iceland | 64.78 | -21.37 | 200 | 0 | |
| Sigmundarstaðir | city | Iceland | 64.78 | -21.37 | 200 | 0 | |
| Siðmúli | city | Iceland | 64.70 | -21.38 | 200 | 0 | |
| Skardhshamrar | city | Iceland | 64.80 | -21.45 | 419 | 0 | |
| Skarðshamrar | city | Iceland | 64.80 | -21.45 | 419 | 0 | |
| Skidhsholt | city | Iceland | 64.63 | -22.25 | 68 | 0 | |
| Skiphylur | city | Iceland | 64.70 | -22.30 | 0 | 0 | |
| Skálanes | city | Iceland | 64.57 | -22.35 | 0 | 0 | |
| Skíðsholt | city | Iceland | 64.63 | -22.25 | 68 | 0 | |
| Sleggjulaekur | city | Iceland | 64.73 | -21.37 | 698 | 0 | |
| Sleggjulækur | city | Iceland | 64.73 | -21.37 | 698 | 0 | |
| Smidhjuholl | city | Iceland | 64.57 | -22.07 | 49 | 0 | |
| Smidhjuholsveggir | city | Iceland | 64.53 | -22.13 | 62 | 0 | |
| Smiðjuhóll | city | Iceland | 64.57 | -22.07 | 49 | 0 | |
| Smiðjuhólsveggir | city | Iceland | 64.53 | -22.13 | 62 | 0 | |
| Solheimatunga | city | Iceland | 64.65 | -21.67 | 62 | 0 | |
| Spoamyri | city | Iceland | 64.72 | -21.50 | 134 | 0 | |
| Stadharhraun | city | Iceland | 64.75 | -22.10 | 259 | 0 | |
| Stadhurhraun | city | Iceland | 64.75 | -22.10 | 259 | 0 | |
| Stafholt | city | Iceland | 64.65 | -21.65 | 134 | 0 | |
| Stangarholt | city | Iceland | 64.65 | -21.88 | 193 | 0 | |
| Stapasel | city | Iceland | 64.73 | -21.67 | 383 | 0 | |
| Staðarhraun | city | Iceland | 64.75 | -22.10 | 259 | 0 | |
| Staðurhraun | city | Iceland | 64.75 | -22.10 | 259 | 0 | |
| Steinar | city | Iceland | 64.70 | -21.50 | 127 | 0 | |
| Storafjall | city | Iceland | 64.68 | -21.75 | 236 | 0 | |
| Stori Kalfalaekur | city | Iceland | 64.67 | -22.30 | 22 | 0 | |
| Storuskogar | city | Iceland | 64.70 | -21.65 | 196 | 0 | |
| Straumfjordhur | city | Iceland | 64.48 | -22.23 | 0 | 0 | |
| Straumfjörður | city | Iceland | 64.48 | -22.23 | 0 | 0 | |
| Stóragröf | city | Iceland | 64.72 | -21.62 | 82 | 0 | |
| Stóri Kálfalækur | city | Iceland | 64.67 | -22.30 | 22 | 0 | |
| Sudhurriki | city | Iceland | 64.55 | -21.92 | 3 | 1276 | |
| Suðurríki | city | Iceland | 64.55 | -21.92 | 3 | 1276 | |
| Svarfhóll | city | Iceland | 64.73 | -22.07 | 305 | 0 | |
| Svarfhóll | city | Iceland | 64.63 | -21.68 | 39 | 0 | |
| Svartagil | city | Iceland | 64.75 | -21.53 | 593 | 0 | |
| Sveinatunga | city | Iceland | 64.85 | -21.27 | 426 | 0 | |
| Svignaskardh | city | Iceland | 64.67 | -21.70 | 78 | 0 | |
| Svignaskarð | city | Iceland | 64.67 | -21.70 | 78 | 0 | |
| Sydhri Hraundalur | city | Iceland | 64.72 | -21.98 | 291 | 0 | |
| Syðri Hraundalur | city | Iceland | 64.72 | -21.98 | 291 | 0 | |
| Síðumúli | city | Iceland | 64.70 | -21.38 | 200 | 0 |