The following are the zip codes in the municipalities and cities of Nueva Ecija.
| Region | Provinces | City/Municipality | Zip Code |
|---|---|---|---|
| Region 3 (Central Luzon) | Nueva Ecija | Fort Magsaysay | 3130 |
| Region 3 (Central Luzon) | Nueva Ecija | Sta. Rosa | 3101 |
| Region 3 (Central Luzon) | Nueva Ecija | Sto. Domingo | 3133 |
| Region 3 (Central Luzon) | Nueva Ecija | Talavera | 3114 |
| Region 3 (Central Luzon) | Nueva Ecija | Talugtog | 3118 |
| Region 3 (Central Luzon) | Nueva Ecija | Zaragoza | 3110 |
| Region 3 (Central Luzon) | Nueva Ecija | San Leonardo | 3102 |
| Region 3 (Central Luzon) | Nueva Ecija | San Jose City | 3121 |
| Region 3 (Central Luzon) | Nueva Ecija | San Isidro | 3106 |
| Region 3 (Central Luzon) | Nueva Ecija | Rizal | 3127 |
| Region 3 (Central Luzon) | Nueva Ecija | San Antonio | 3108 |
| Region 3 (Central Luzon) | Nueva Ecija | Quezon | 3113 |
| Region 3 (Central Luzon) | Nueva Ecija | Peñaranda | 3103 |
| Region 3 (Central Luzon) | Nueva Ecija | Pantabangan | 3124 |
| Region 3 (Central Luzon) | Nueva Ecija | Palayan City | 3132 |
| Region 3 (Central Luzon) | Nueva Ecija | Nampicuan | 3116 |
| Region 3 (Central Luzon) | Nueva Ecija | Muñoz | 3119 |
| Region 3 (Central Luzon) | Nueva Ecija | Lupao | 3122 |
| Region 3 (Central Luzon) | Nueva Ecija | Llanera | 3126 |
| Region 3 (Central Luzon) | Nueva Ecija | Licab | 3112 |
| Region 3 (Central Luzon) | Nueva Ecija | Central Luzon State University | 3120 |
| Region 3 (Central Luzon) | Nueva Ecija | Jaen | 3109 |
| Region 3 (Central Luzon) | Nueva Ecija | Laur | 3129 |
| Region 3 (Central Luzon) | Nueva Ecija | Guimba | 3115 |
| Region 3 (Central Luzon) | Nueva Ecija | Gen. Tinio | 3104 |
| Region 3 (Central Luzon) | Nueva Ecija | Gen. M. Natividad | 3125 |
| Region 3 (Central Luzon) | Nueva Ecija | Gapan City | 3105 |
| Region 3 (Central Luzon) | Nueva Ecija | Gabaldon | 3131 |
| Region 3 (Central Luzon) | Nueva Ecija | Cuyapo | 3117 |
| Region 3 (Central Luzon) | Nueva Ecija | Carrangalan | 3123 |
| Region 3 (Central Luzon) | Nueva Ecija | Cabiao | 3107 |
| Region 3 (Central Luzon) | Nueva Ecija | Cabanatuan City | 3100 |
| Region 3 (Central Luzon) | Nueva Ecija | Bongabon | 3128 |
| Region 3 (Central Luzon) | Nueva Ecija | Aliaga | 3111 |
