| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Dualez | city | Cantabria | Spain | 43.36 | -4.05 | 72 | 59802 |
| Duancos | city | Galicia | Spain | 43.10 | -7.45 | 1771 | 6039 |
| Duanez | city | Castilla y Leon | Spain | 41.74 | -2.33 | 3431 | 279 |
| Duarria | city | Galicia | Spain | 43.13 | -7.48 | 1669 | 6091 |
| Duda | city | Andalucia | Spain | 37.84 | -2.67 | 3697 | 1528 |
| Dudagoitia | city | Euskadi | Spain | 43.22 | -2.70 | 830 | 17902 |
| Duesaiguees | city | Cataluna | Spain | 41.15 | 0.93 | 830 | 2709 |
| Duesaigües | city | Cataluna | Spain | 41.15 | 0.93 | 830 | 2709 |
| Dueso | city | Cantabria | Spain | 43.46 | -3.46 | 830 | 17022 |
| Duesos | city | Asturias | Spain | 43.47 | -5.21 | 364 | 2949 |
| Dueñas | city | Castilla y Leon | Spain | 41.88 | -4.55 | 2509 | 3805 |
| Dujame | city | Galicia | Spain | 42.84 | -8.17 | 1669 | 3861 |
| Dulantzi | city | Euskadi | Spain | 42.84 | -2.51 | 1853 | 6851 |
| Dulantzi / Alegría | city | Euskadi | Spain | 42.84 | -2.51 | 1853 | 6851 |
| Dumbria | city | Galicia | Spain | 43.01 | -9.11 | 830 | 2578 |
| Dumia | city | Galicia | Spain | 42.85 | -7.07 | 2509 | 1155 |
| Dumpin | city | Galicia | Spain | 43.12 | -7.48 | 1669 | 6815 |
| Duna | city | Cantabria | Spain | 43.34 | -4.22 | 830 | 9381 |
| Durana | city | Euskadi | Spain | 42.89 | -2.64 | 1669 | 63509 |
| Durango | city | Euskadi | Spain | 43.17 | -2.63 | 393 | 39354 |
| Duraton | city | Castilla y Leon | Spain | 41.28 | -3.68 | 3349 | 723 |
| Durikiz | city | Euskadi | Spain | 43.38 | -2.63 | 830 | 3314 |
| Duron | city | Castilla-La Mancha | Spain | 40.63 | -2.73 | 2509 | 580 |
| Durro | city | Cataluna | Spain | 42.50 | 0.82 | 5869 | 438 |
| Durruma | city | Euskadi | Spain | 42.86 | -2.31 | 2011 | 1466 |
| Durruma / San Román de San Millán | city | Euskadi | Spain | 42.86 | -2.31 | 2011 | 1466 |
| Durruma Kanpezu | city | Euskadi | Spain | 42.67 | -2.44 | 2555 | 715 |
| Durruma Kanpezu / San Román de Campezo | city | Euskadi | Spain | 42.67 | -2.44 | 2555 | 715 |
| Duruelo | city | Castilla y Leon | Spain | 41.95 | -2.93 | 4189 | 2734 |
| Duruelo | city | Castilla y Leon | Spain | 41.24 | -3.65 | 3349 | 572 |
| Duruelo | city | Castilla y Leon | Spain | 40.65 | -4.80 | 4189 | 1104 |
| Duruelo de la Sierra | city | Castilla y Leon | Spain | 41.95 | -2.93 | 4189 | 2734 |
| Duruquiz | city | Euskadi | Spain | 43.38 | -2.63 | 830 | 3314 |
| Duyo | city | Galicia | Spain | 42.93 | -9.28 | 183 | 5083 |
| Duyo | city | Galicia | Spain | 42.93 | -9.27 | 55 | 5602 |
| Duyos | city | Asturias | Spain | 43.46 | -5.20 | 1003 | 3403 |