| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sadowa | city | Poland | 52.35 | 20.83 | 206 | 18086 | |
| Sadowo | city | Poland | 52.35 | 20.83 | 206 | 18086 | |
| Sady | city | Poland | 52.43 | 20.67 | 170 | 28066 | |
| Saska Kepa | city | Poland | 52.25 | 21.07 | 262 | 459709 | |
| Secymin Niemiecki | city | Poland | 52.40 | 20.43 | 183 | 3665 | |
| Secymin Polski | city | Poland | 52.38 | 20.43 | 170 | 3173 | |
| Sekocin Nowy | city | Poland | 52.12 | 20.88 | 318 | 25442 | |
| Sekocin Stary | city | Poland | 52.10 | 20.88 | 380 | 22170 | |
| Serock | city | Poland | 52.52 | 21.07 | 203 | 6899 | |
| Siedliska | city | Poland | 52.07 | 21.05 | 367 | 59549 | |
| Siekierki | city | Poland | 52.22 | 21.08 | 246 | 435779 | |
| Sieraków | city | Poland | 52.32 | 20.82 | 252 | 18092 | |
| Sierzchów | city | Poland | 52.00 | 21.13 | 344 | 13687 | |
| Siestrzen | city | Poland | 52.05 | 20.72 | 459 | 9041 | |
| Siwek | city | Poland | 52.48 | 21.10 | 229 | 7099 | |
| Siwki | city | Poland | 52.32 | 21.13 | 282 | 73112 | |
| Skazowka | city | Poland | 52.33 | 21.28 | 314 | 43712 | |
| Skierdy | city | Poland | 52.40 | 20.82 | 232 | 10284 | |
| Skolimów | city | Poland | 52.08 | 21.12 | 328 | 34927 | |
| Skolimów-Konstancin | city | Poland | 52.08 | 21.12 | 328 | 34927 | |
| Skorosze | city | Poland | 52.18 | 20.90 | 314 | 158471 | |
| Skrzeszew | city | Poland | 52.47 | 20.90 | 219 | 11291 | |
| Skubianka | city | Poland | 52.48 | 21.00 | 282 | 7651 | |
| Slawek | city | Poland | 52.35 | 21.25 | 311 | 51827 | |
| Slomczyn | city | Poland | 52.07 | 21.17 | 272 | 23058 | |
| Slomin | city | Poland | 52.10 | 20.90 | 387 | 23687 | |
| Slonim | city | Poland | 52.10 | 20.90 | 387 | 23687 | |
| Slupno | city | Poland | 52.40 | 21.15 | 275 | 15665 | |
| Sluzew | city | Poland | 52.17 | 21.03 | 308 | 359678 | |
| Sluzewiec | city | Poland | 52.17 | 21.05 | 272 | 337275 | |
| Smoly | city | Poland | 52.50 | 20.58 | 308 | 3975 | |
| Smoły | city | Poland | 52.50 | 20.58 | 308 | 3975 | |
| Sobikow | city | Poland | 51.97 | 21.15 | 374 | 10784 | |
| Sokolow | city | Poland | 52.13 | 20.87 | 318 | 38858 | |
| Sokolowek | city | Poland | 52.48 | 21.18 | 278 | 7066 | |
| Sokołów | city | Poland | 52.13 | 20.87 | 318 | 38858 | |
| Sokołówek | city | Poland | 52.48 | 21.18 | 278 | 7066 | |
| Soplicowo | city | Poland | 52.08 | 21.30 | 318 | 38400 | |
| Sowia Wola | city | Poland | 52.37 | 20.65 | 200 | 5340 | |
| Sródborów | city | Poland | 52.10 | 21.32 | 393 | 40113 | |
| Stanislawow | city | Poland | 52.42 | 20.97 | 223 | 46816 | |
| Stanislawow | city | Poland | 52.40 | 20.57 | 209 | 3974 | |
| Stanislawow | city | Poland | 52.38 | 21.03 | 229 | 20750 | |
| Stanislawowo | city | Poland | 52.52 | 20.92 | 314 | 5871 | |
| Stanislawowo | city | Poland | 52.47 | 20.73 | 147 | 22243 | |
| Stanisławowo | city | Poland | 52.52 | 20.92 | 314 | 5871 | |
| Stanisławowo | city | Poland | 52.47 | 20.73 | 147 | 22243 | |
| Stanisławów | city | Poland | 52.40 | 20.57 | 209 | 3974 | |
| Stanisławów | city | Poland | 52.38 | 21.03 | 229 | 20750 | |
| Stanisławów | city | Poland | 52.42 | 20.97 | 223 | 46816 | |
| Stara Iwiczna | city | Poland | 52.08 | 20.98 | 318 | 44414 | |
| Stara Wieś | city | Poland | 52.08 | 20.77 | 344 | 11205 | |
| Stare Babice | city | Poland | 52.25 | 20.85 | 324 | 102060 | |
| Stare Bródno | city | Poland | 52.30 | 21.05 | 236 | 230136 | |
| Stary Luszczewek | city | Poland | 52.23 | 20.53 | 239 | 6171 | |
| Stary Modlin | city | Poland | 52.45 | 20.72 | 144 | 27864 | |
| Stary Rembertów | city | Poland | 52.27 | 21.17 | 295 | 66256 | |
| Stary Łuszczewek | city | Poland | 52.23 | 20.53 | 239 | 6171 | |
| Stefanowo | city | Poland | 52.05 | 20.87 | 351 | 18454 | |
| Stefanów | city | Poland | 51.98 | 21.22 | 305 | 10222 | |
| Struga | city | Poland | 52.37 | 21.13 | 285 | 26668 | |
| Strzeniowka | city | Poland | 52.12 | 20.80 | 301 | 45038 | |
| Strzyzew | city | Poland | 52.27 | 20.37 | 259 | 4445 | |
| Suchocin | city | Poland | 52.42 | 20.78 | 226 | 13862 | |
| Suchodol | city | Poland | 51.98 | 20.78 | 547 | 4583 | |
| Suchodół | city | Poland | 51.98 | 20.78 | 547 | 4583 | |
| Suchy Las | city | Poland | 52.13 | 20.85 | 291 | 47720 | |
| Sulejówek | city | Poland | 52.25 | 21.28 | 347 | 33197 | |
| Swidry Male | city | Poland | 52.12 | 21.20 | 269 | 45269 | |
| Swiecice | city | Poland | 52.22 | 20.70 | 236 | 17276 | |
| Swobodnia | city | Poland | 52.48 | 20.63 | 265 | 15342 | |
| Szamocin | city | Poland | 52.35 | 21.03 | 232 | 35548 | |
| Szamoty | city | Poland | 52.07 | 20.85 | 341 | 15938 | |
| Szamoty Male | city | Poland | 52.07 | 20.83 | 341 | 12124 | |
| Szamoty Małe | city | Poland | 52.07 | 20.83 | 341 | 12124 | |
| Szamoty Wielkie | city | Poland | 52.07 | 20.85 | 341 | 15938 | |
| Szczaki | city | Poland | 52.02 | 20.88 | 383 | 15265 | |
| Szczypiomo | city | Poland | 52.50 | 20.67 | 219 | 9346 | |
| Szczypiorno | city | Poland | 52.50 | 20.67 | 219 | 9346 | |
| Szczęśliwice | city | Poland | 52.20 | 20.95 | 305 | 354031 | |
| Szkopówka | city | Poland | 52.23 | 21.25 | 328 | 42274 | |
| Szulec | city | Poland | 52.03 | 21.10 | 331 | 20511 | |
| Szymanów | city | Poland | 52.03 | 21.12 | 354 | 18210 | |
| Sękocin | city | Poland | 52.12 | 20.88 | 318 | 25442 | |
| Sławek | city | Poland | 52.35 | 21.25 | 311 | 51827 | |
| Słomczyn | city | Poland | 52.07 | 21.17 | 272 | 23058 | |
| Słomin | city | Poland | 52.10 | 20.90 | 387 | 23687 | |
| Słonim | city | Poland | 52.10 | 20.90 | 387 | 23687 | |
| Słupno | city | Poland | 52.40 | 21.15 | 275 | 15665 | |
| Służew | city | Poland | 52.17 | 21.03 | 308 | 359678 | |
| Służewiec | city | Poland | 52.17 | 21.05 | 272 | 337275 |