| 1 | Barangay Rizal City of Santiago, Isabela | City of Santiago | Isabela | 14,362 |
| 2 | Barangay Rosario City of Santiago, Isabela | City of Santiago | Isabela | 12,399 |
| 3 | Barangay San Fermin City of Cauayan, Isabela | City of Cauayan | Isabela | 12,047 |
| 4 | Barangay District I (Pob.) City of Cauayan, Isabela | City of Cauayan | Isabela | 11,355 |
| 5 | Barangay Ugac Sur Tuguegarao City, Cagayan | Tuguegarao City | Cagayan | 9,923 |
| 6 | Barangay Cataggaman Nuevo Tuguegarao City, Cagayan | Tuguegarao City | Cagayan | 9,539 |
| 7 | Barangay Ugac Norte Tuguegarao City, Cagayan | Tuguegarao City | Cagayan | 9,268 |
| 8 | Barangay Batal City of Santiago, Isabela | City of Santiago | Isabela | 9,009 |
| 9 | Barangay Roxas Solano, Nueva Vizcaya | Solano | Nueva Vizcaya | 8,696 |
| 10 | Barangay Caggay Tuguegarao City, Cagayan | Tuguegarao City | Cagayan | 8,500 |
| 11 | Barangay Cabaruan City of Cauayan, Isabela | City of Cauayan | Isabela | 8,244 |
| 12 | Barangay Maura Aparri, Cagayan | Aparri | Cagayan | 8,094 |
| 13 | Barangay Imelda Bliss Village City of Ilagan, Isabela | City of Ilagan | Isabela | 7,951 |
| 14 | Barangay Alibagu City of Ilagan, Isabela | City of Ilagan | Isabela | 7,916 |
| 15 | Barangay San Gabriel Tuguegarao City, Cagayan | Tuguegarao City | Cagayan | 7,772 |
| 16 | Barangay Plaridel City of Santiago, Isabela | City of Santiago | Isabela | 7,377 |
| 17 | Barangay Linao East Tuguegarao City, Cagayan | Tuguegarao City | Cagayan | 7,349 |
| 18 | Barangay Bugallon Proper (Pob.) Ramon, Isabela | Ramon | Isabela | 7,335 |
| 19 | Barangay Mabini City of Santiago, Isabela | City of Santiago | Isabela | 7,286 |
| 20 | Barangay Caliguian (Pob.) Burgos, Isabela | Burgos | Isabela | 6,925 |
| 21 | Barangay Pengue Tuguegarao City, Cagayan | Tuguegarao City | Cagayan | 6,645 |
| 22 | Barangay Baluarte City of Santiago, Isabela | City of Santiago | Isabela | 6,431 |
| 23 | Barangay Quirino Solano, Nueva Vizcaya | Solano | Nueva Vizcaya | 6,405 |
| 24 | Barangay Sotero Nuesa Roxas, Isabela | Roxas | Isabela | 6,336 |
| 25 | Barangay Centro (Pob.) Santa Ana, Cagayan | Santa Ana | Cagayan | 6,311 |
| 26 | Barangay Rizal (Pob.) Roxas, Isabela | Roxas | Isabela | 6,265 |
| 27 | Barangay District III (Pob.) City of Cauayan, Isabela | City of Cauayan | Isabela | 6,263 |
| 28 | Barangay Calaocan City of Santiago, Isabela | City of Santiago | Isabela | 6,239 |
| 29 | Barangay Minante I City of Cauayan, Isabela | City of Cauayan | Isabela | 6,192 |
| 30 | Barangay Sampaguita Solana, Cagayan | Solana | Cagayan | 6,073 |
| 31 | Barangay Paddad Alicia, Isabela | Alicia | Isabela | 6,001 |
| 32 | Barangay Naggasican City of Santiago, Isabela | City of Santiago | Isabela | 5,986 |
| 33 | Barangay General Aguinaldo Ramon, Isabela | Ramon | Isabela | 5,965 |
| 34 | Barangay Salinungan West San Mateo, Isabela | San Mateo | Isabela | 5,871 |
| 35 | Barangay Patul City of Santiago, Isabela | City of Santiago | Isabela | 5,852 |
| 36 | Barangay Hacienda Intal Baggao, Cagayan | Baggao | Cagayan | 5,802 |
| 37 | Barangay Bugallon Norte Ramon, Isabela | Ramon | Isabela | 5,760 |
| 38 | Barangay San Miguel Ramon, Isabela | Ramon | Isabela | 5,713 |
| 39 | Barangay Bantug (Pob.) Roxas, Isabela | Roxas | Isabela | 5,703 |
| 40 | Barangay Osmeña Solano, Nueva Vizcaya | Solano | Nueva Vizcaya | 5,700 |
| 41 | Barangay Raniag Ramon, Isabela | Ramon | Isabela | 5,613 |
| 42 | Barangay San Vicente Santa Ana, Cagayan | Santa Ana | Cagayan | 5,571 |
| 43 | Barangay Sagana City of Santiago, Isabela | City of Santiago | Isabela | 5,554 |
| 44 | Barangay Macanaya Aparri, Cagayan | Aparri | Cagayan | 5,553 |
| 45 | Barangay Runruno Quezon, Nueva Vizcaya | Quezon | Nueva Vizcaya | 5,548 |
| 46 | Barangay Magsaysay Bayombong, Nueva Vizcaya | Bayombong | Nueva Vizcaya | 5,496 |
| 47 | Barangay Tanza Tuguegarao City, Cagayan | Tuguegarao City | Cagayan | 5,429 |
| 48 | Barangay Quezon Solano, Nueva Vizcaya | Solano | Nueva Vizcaya | 5,404 |
| 49 | Barangay Catabayungan Cabagan, Isabela | Cabagan | Isabela | 5,373 |
| 50 | Barangay Bonfal West Bayombong, Nueva Vizcaya | Bayombong | Nueva Vizcaya | 5,308 |