71 cities and towns
| Abbreviation | 39 |
| State Population | 491,350 |
| # | City | Population | Median Income | Home Value | Median Rent | Median Age |
|---|---|---|---|---|---|---|
| 1 | Santander | 173,635 | N/A | N/A | N/A | 44.9 |
| 2 | Torrelavega | 55,297 | N/A | N/A | N/A | 44.9 |
| 3 | Castro-Urdiales | 31,977 | N/A | N/A | N/A | 44.9 |
| 4 | Camargo | 30,263 | N/A | N/A | N/A | 44.9 |
| 5 | El Astillero | 18,108 | N/A | N/A | N/A | 44.9 |
| 6 | Santoña | 11,569 | N/A | N/A | N/A | 44.9 |
| 7 | Los Corrales de Buelna | 11,519 | N/A | N/A | N/A | 44.9 |
| 8 | Santa Cruz de Bezana | 11,279 | N/A | N/A | N/A | 44.9 |
| 9 | Laredo | 11,148 | N/A | N/A | N/A | 44.9 |
| 10 | Reinosa | 10,307 | N/A | N/A | N/A | 44.9 |
| 11 | Cabezón de la Sal | 8,057 | N/A | N/A | N/A | 44.9 |
| 12 | Reocín | 7,230 | N/A | N/A | N/A | 44.9 |
| 13 | Colindres | 7,179 | N/A | N/A | N/A | 44.9 |
| 14 | Suances | 6,984 | N/A | N/A | N/A | 44.9 |
| 15 | Santa María de Cayón | 6,710 | N/A | N/A | N/A | 44.9 |
| 16 | Renedo | 5,283 | N/A | N/A | N/A | 44.9 |
| 17 | San Vicente de la Barquera | 4,158 | N/A | N/A | N/A | 44.9 |
| 18 | Santillana | 4,042 | N/A | N/A | N/A | 44.9 |
| 19 | Miengo | 3,914 | N/A | N/A | N/A | 44.9 |
| 20 | Cartes | 3,780 | N/A | N/A | N/A | 44.9 |
| 21 | Ampuero | 3,713 | N/A | N/A | N/A | 44.9 |
| 22 | Liencres | 3,674 | N/A | N/A | N/A | 44.9 |
| 23 | Boo | 3,570 | N/A | N/A | N/A | 44.9 |
| 24 | Villaescusa | 3,434 | N/A | N/A | N/A | 44.9 |
| 25 | Bárcena de Cicero | 3,003 | N/A | N/A | N/A | 44.9 |
| 26 | Arce | 2,859 | N/A | N/A | N/A | 44.9 |
| 27 | Puente Viesgo | 2,558 | N/A | N/A | N/A | 44.9 |
| 28 | Ramales de la Victoria | 2,294 | N/A | N/A | N/A | 44.9 |
| 29 | Noja | 2,255 | N/A | N/A | N/A | 44.9 |
| 30 | Comillas | 2,156 | N/A | N/A | N/A | 44.9 |
| 31 | Selaya | 1,991 | N/A | N/A | N/A | 44.9 |
| 32 | Luzmela | 1,982 | N/A | N/A | N/A | 44.9 |
| 33 | Vioño | 1,948 | N/A | N/A | N/A | 44.9 |
| 34 | Arenas de Iguña | 1,906 | N/A | N/A | N/A | 44.9 |
| 35 | Bareyo | 1,893 | N/A | N/A | N/A | 44.9 |
| 36 | Molledo | 1,858 | N/A | N/A | N/A | 44.9 |
| 37 | Villacarriedo | 1,711 | N/A | N/A | N/A | 44.9 |
| 38 | Penagos | 1,704 | N/A | N/A | N/A | 44.9 |
| 39 | Limpias | 1,487 | N/A | N/A | N/A | 44.9 |
| 40 | Potes | 1,481 | N/A | N/A | N/A | 44.9 |
| 41 | San Miguel de Meruelo | 1,398 | N/A | N/A | N/A | 44.9 |
| 42 | Argoños | 1,380 | N/A | N/A | N/A | 44.9 |
| 43 | Santiurde de Toranzo | 1,349 | N/A | N/A | N/A | 44.9 |
| 44 | Mataporquera | 1,323 | N/A | N/A | N/A | 44.9 |
| 45 | Hazas de Cesto | 1,284 | N/A | N/A | N/A | 44.9 |
| 46 | San Martín de Elines | 1,258 | N/A | N/A | N/A | 44.9 |
| 47 | Villafufre | 1,109 | N/A | N/A | N/A | 44.9 |
| 48 | Solórzano | 1,081 | N/A | N/A | N/A | 44.9 |
| 49 | Zurita | 1,032 | N/A | N/A | N/A | 44.9 |
| 50 | Polanco | 1,000 | N/A | N/A | N/A | 44.9 |