| City | 2026 Pop. ↓ |
|---|---|
| Alacant/Alicante | 372,813 |
| Almeria | 206,275 |
| Alcala de Henares | 204,512 |
| Alcorcon | 176,491 |
| Albacete | 175,700 |
| Algeciras | 127,312 |
| Alcobendas | 124,562 |
| Arona | 88,968 |
| Alcala de Guadaira | 77,894 |
| Aviles | 75,059 |
| Arrecife | 72,114 |
| Aranjuez | 63,683 |
| Alcoi/Alcoy | 61,902 |
| Arganda del Rey | 61,299 |
| Avila | 59,228 |
| Adeje | 50,348 |