| Code | Name | Region |
|---|---|---|
| ES2ZE | Zeneta | MU |
| ESZRG | Zurgena | AL |
| ESZBA | Zierbena | |
| ESZZM | Zizur Mayor | NA |
| ESZZK | Zizurkil | SS |
| ESZIZ | Zizurquil | |
| ESZFB | Zona Franca De Barcelona | B |
| ESZFR | Zona Franca De Cadiz | |
| ESZOR | Zorita | CC |
| ESZRC | Zorita De Los Canes | GU |
| ESZVV | Zuazo De Vitoria | VI |
| ESZLG | Zubillaga | SS |
| ESZUB | Zubiri | |
| ESZUE | Zuera | |
| ESZRR | Zumarraga | |
| ESZMY | Zumaya | |
| ESZJA | Zurbaran | |
| ESZMR | Zamora | |
| ESZOS | Zamoranos | CO |
| ESZAM | Zamudio | BI |
| ESZAZ | Zaragoza | |
| ESZRM | Zaramillo | BI |
| ESZAR | Zaratamo | BI |
| ESZRT | Zaratan | VA |
| ESZAU | Zarautz | SS |
| ESZDR | Zarcilla De Ramos | MU |
| ESZZC | Zarza Capilla | BA |
| ESZDG | Zarza De Granadilla | CC |
| ESZZJ | Zarzalejo | M |
| ESDBI | Zaldibia | SS |
| ESZZP | Zarzuela Del Pinar | SG |
| ESZVK | Zaldivia | SS |
| ESZZS | Zas | C |
| ESZVC | Zalla | BI |
| ESZOC | Zeanuri | |
| ESRZZ | Zambrana | VI |
| ESSGM | Zegama | SS |
| ESYNL | Yuncler | TO |
| ESYUN | Yuncos | TO |
| ESZAX | Yunquera | MA |
| ESYQE | Yunquera De Henares | GU |
| ESYUR | Yurre | BI |
| ESZYY | Zafarraya | |
| ESZAF | Zafra | |
| ESZD4 | Zahara De Los Atunes | CA |
| ESXOV | Xove | LU |
| ESZAH | Zahinos | |
| ESYZA | Yaiza | GC |
| ESZ8N | Zalain | NA |
| ESYTV | Yatova | V |