| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Castielfabib | city | Comunitat Valenciana | Spain | 40.13 | -1.30 | 3349 | 758 |
| Castiello | city | Asturias | Spain | 43.52 | -5.53 | 830 | 10663 |
| Castiello | city | Asturias | Spain | 43.50 | -5.52 | 1669 | 7044 |
| Castiello | city | Asturias | Spain | 43.47 | -5.83 | 830 | 32275 |
| Castiello | city | Asturias | Spain | 43.46 | -5.49 | 269 | 3444 |
| Castiello | city | Asturias | Spain | 43.41 | -5.40 | 1669 | 2747 |
| Castiello | city | Asturias | Spain | 43.37 | -5.64 | 1167 | 23821 |
| Castiello | city | Asturias | Spain | 43.37 | -5.23 | 249 | 4680 |
| Castiello | city | Asturias | Spain | 43.20 | -6.45 | 2509 | 1490 |
| Castiello de Abajo | city | Asturias | Spain | 43.50 | -5.33 | 830 | 2630 |
| Castiello de Arriba | city | Asturias | Spain | 43.46 | -5.49 | 269 | 3444 |
| Castiello de Jaca | city | Aragon | Spain | 42.63 | -0.55 | 3349 | 2777 |
| Castiello de la Barca | city | Asturias | Spain | 43.30 | -6.37 | 1669 | 3669 |
| Castigaleu | city | Aragon | Spain | 42.20 | 0.58 | 2713 | 258 |
| Castil de Campos | city | Andalucia | Spain | 37.49 | -4.14 | 2742 | 6086 |
| Castil de Carrias | city | Castilla y Leon | Spain | 42.47 | -3.27 | 2893 | 1220 |
| Castil de Lences | city | Castilla y Leon | Spain | 42.64 | -3.55 | 2509 | 315 |
| Castil de Peones | city | Castilla y Leon | Spain | 42.48 | -3.38 | 2670 | 1433 |
| Castil de Tierra | city | Castilla y Leon | Spain | 41.57 | -2.28 | 3582 | 353 |
| Castil de Vela | city | Castilla y Leon | Spain | 41.98 | -4.96 | 2509 | 429 |
| Castilblanco | city | Andalucia | Spain | 37.68 | -5.99 | 1227 | 1355 |
| Castilblanco | city | Castilla y Leon | Spain | 40.80 | -4.96 | 3349 | 862 |
| Castilblanco | city | Extremadura | Spain | 39.28 | -5.09 | 1669 | 1066 |
| Castilblanco de Henares | city | Castilla-La Mancha | Spain | 40.95 | -2.94 | 2677 | 1395 |
| Castilblanco de los Arroyos | city | Andalucia | Spain | 37.68 | -5.99 | 1227 | 1355 |
| Castilblanques | city | Comunitat Valenciana | Spain | 39.32 | -1.02 | 2509 | 417 |
| Castildelgado | city | Castilla y Leon | Spain | 42.44 | -3.08 | 2509 | 937 |
| Castilfalé | city | Castilla y Leon | Spain | 42.22 | -5.42 | 2693 | 491 |
| Castilforte | city | Castilla-La Mancha | Spain | 40.56 | -2.43 | 3366 | 276 |
| Castilfrío de la Sierra | city | Castilla y Leon | Spain | 41.92 | -2.30 | 4189 | 252 |
| Castiliscar | city | Aragon | Spain | 42.38 | -1.27 | 2509 | 518 |
| Castillar de Santisteban | city | Andalucia | Spain | 38.25 | -3.13 | 2509 | 1944 |
| Castillazuelo | city | Aragon | Spain | 42.07 | 0.06 | 1194 | 4720 |
| Castilleja | city | Andalucia | Spain | 37.39 | -6.05 | 282 | 206242 |
| Castilleja de Guzmán | city | Andalucia | Spain | 37.41 | -6.06 | 830 | 152890 |
| Castilleja de la Cuesta | city | Andalucia | Spain | 37.39 | -6.05 | 282 | 206242 |
| Castilleja del Campo | city | Andalucia | Spain | 37.39 | -6.33 | 830 | 5510 |
| Castillejar | city | Andalucia | Spain | 37.72 | -2.64 | 2509 | 1159 |
| Castillejo | city | Castilla y Leon | Spain | 41.11 | -3.73 | 4189 | 893 |
| Castillejo de Azaba | city | Castilla y Leon | Spain | 40.46 | -6.70 | 2559 | 803 |
| Castillejo de Dos Casas | city | Castilla y Leon | Spain | 40.70 | -6.77 | 2509 | 711 |
| Castillejo de Evans | city | Castilla y Leon | Spain | 40.93 | -6.22 | 2509 | 442 |
| Castillejo de Iniesta | city | Castilla-La Mancha | Spain | 39.53 | -1.77 | 2726 | 1334 |
| Castillejo de Martín Viejo | city | Castilla y Leon | Spain | 40.70 | -6.64 | 2509 | 269 |
| Castillejo de Mesleón | city | Castilla y Leon | Spain | 41.28 | -3.60 | 3349 | 683 |
| Castillejo de Robledo | city | Castilla y Leon | Spain | 41.56 | -3.50 | 3349 | 356 |
| Castillejo de San Pedro | city | Castilla y Leon | Spain | 41.96 | -2.17 | 3349 | 252 |
| Castillejo del Romeral | city | Castilla-La Mancha | Spain | 40.15 | -2.50 | 3349 | 435 |
| Castillejo-Sierra | city | Castilla-La Mancha | Spain | 40.37 | -2.14 | 3415 | 306 |
| Castillejos | city | Extremadura | Spain | 38.72 | -6.52 | 935 | 4205 |
| Castillo | city | Cantabria | Spain | 43.46 | -3.55 | 160 | 7215 |
| Castillo | city | Galicia | Spain | 43.16 | -8.22 | 1256 | 2730 |
| Castillo | city | Euskadi | Spain | 42.81 | -2.67 | 2011 | 64431 |
| Castillo | city | Extremadura | Spain | 40.35 | -6.38 | 1833 | 1026 |
| Castillo | city | Andalucia | Spain | 37.98 | -3.07 | 1709 | 3234 |
| Castillo Bajo | city | Andalucia | Spain | 36.73 | -3.97 | 0 | 12515 |
| Castillo Banos | city | Andalucia | Spain | 36.74 | -3.30 | 0 | 1804 |
| Castillo Barués | city | Aragon | Spain | 42.41 | -1.23 | 2509 | 353 |
| Castillo Romeral | city | Canarias | Spain | 27.80 | -15.46 | 321 | 17695 |
| Castillo de Albarañez | city | Castilla-La Mancha | Spain | 40.30 | -2.39 | 3349 | 275 |
| Castillo de Aldovea | city | Madrid | Spain | 40.43 | -3.47 | 1804 | 128141 |
| Castillo de Aro | city | Cataluna | Spain | 41.82 | 3.03 | 6 | 25915 |
| Castillo de Azagala | city | Extremadura | Spain | 39.23 | -6.86 | 830 | 747 |
| Castillo de Banos | city | Andalucia | Spain | 36.74 | -3.30 | 0 | 1804 |
| Castillo de Bayuela | city | Castilla-La Mancha | Spain | 40.10 | -4.69 | 1669 | 1452 |
| Castillo de Garcimunoz | city | Castilla-La Mancha | Spain | 39.66 | -2.38 | 2746 | 531 |
| Castillo de Huarea | city | Andalucia | Spain | 36.75 | -3.14 | 0 | 5204 |
| Castillo de Locubín | city | Andalucia | Spain | 37.53 | -3.94 | 2552 | 6517 |
| Castillo de Montjuich | city | Cataluna | Spain | 41.36 | 2.17 | 0 | 802194 |
| Castillo de Recena | city | Andalucia | Spain | 37.85 | -3.56 | 1669 | 3719 |
| Castillo de Sabinillas | city | Andalucia | Spain | 36.35 | -5.23 | 0 | 7959 |
| Castillo de San Fernando | city | Cataluna | Spain | 42.27 | 2.95 | 131 | 37279 |
| Castillo de Villamalefa | city | Comunitat Valenciana | Spain | 40.13 | -0.38 | 2896 | 355 |
| Castillo de Villamaleja | city | Comunitat Valenciana | Spain | 40.13 | -0.38 | 2896 | 355 |
| Castillo de Villamaleta | city | Comunitat Valenciana | Spain | 40.13 | -0.38 | 2896 | 355 |
| Castillo de la Barca | city | Asturias | Spain | 43.30 | -6.37 | 1669 | 3669 |
| Castillo de la Duquesa | city | Andalucia | Spain | 36.35 | -5.23 | 0 | 7959 |
| Castillo de la Ribera | city | Castilla y Leon | Spain | 42.55 | -5.55 | 2618 | 70936 |
| Castillo de la Sabinilla | city | Andalucia | Spain | 36.35 | -5.23 | 0 | 7959 |
| Castillo de los Infantes | city | Galicia | Spain | 42.77 | -7.37 | 1669 | 9608 |
| Castillo del Reboller | city | Comunitat Valenciana | Spain | 38.92 | -0.15 | 830 | 40193 |
| Castillo del Romeral | city | Canarias | Spain | 27.80 | -15.46 | 321 | 17695 |
| Castillo-Albaráñez | city | Castilla-La Mancha | Spain | 40.30 | -2.39 | 3349 | 275 |
| Castillo-Elejabeitia | city | Euskadi | Spain | 43.13 | -2.78 | 830 | 5905 |
| Castillo-Nuevo | city | Navarra | Spain | 42.68 | -1.03 | 2509 | 200 |
| Castillo-Pedroso | city | Cantabria | Spain | 43.22 | -3.97 | 1669 | 2363 |
| Castillo/Gaztelu | city | Euskadi | Spain | 42.81 | -2.67 | 2011 | 64431 |
| Castillon de Villamatefa | city | Comunitat Valenciana | Spain | 40.13 | -0.38 | 2896 | 355 |
| Castillonroy | city | Aragon | Spain | 41.89 | 0.51 | 1223 | 1110 |
| Castillonuevo | city | Navarra | Spain | 42.68 | -1.03 | 2509 | 200 |
| Castilló de Sos | city | Aragon | Spain | 42.51 | 0.49 | 3674 | 828 |
| Castillón | city | Galicia | Spain | 42.53 | -7.64 | 1669 | 2003 |
| Castilmimbre | city | Castilla-La Mancha | Spain | 40.72 | -2.77 | 3398 | 682 |
| Castilmoure | city | Asturias | Spain | 43.14 | -6.47 | 4189 | 1866 |
| Castilnuevo | city | Castilla-La Mancha | Spain | 40.81 | -1.86 | 3638 | 913 |
| Castilruiz | city | Castilla y Leon | Spain | 41.88 | -2.06 | 3349 | 462 |
| Castilsabás | city | Aragon | Spain | 42.20 | -0.31 | 2509 | 524 |
| Castilseco | city | La Rioja | Spain | 42.61 | -2.96 | 1856 | 6790 |
| Castiltierra | city | Castilla y Leon | Spain | 41.39 | -3.53 | 3349 | 581 |
| Castineira | city | Galicia | Spain | 42.18 | -7.20 | 2874 | 745 |
| Castineira | city | Galicia | Spain | 42.10 | -7.03 | 4189 | 1121 |
| Castineiras | city | Galicia | Spain | 42.53 | -9.00 | 3 | 11587 |