Island of Luzon
| Rank of Official | Rank of District | Name | Prevailing Dialect | Population | Pueblos |
| G. | P. | Abra | Ilocano | 34,337 | 5 |
| A1. | P. | Albay | Bicol | 330,121 | 34 |
| A2. | P. | Bataan | Tagalog, Pampangan | 44,794 | 10 |
| A1. | P. | Batangas | Tagalog | 280,100 | |
| D. | Benguet | Igorot, Ilocano, Pangasinan | 8,465 | ||
| D. | Bontoc | Suflin, Ilocano, Igorot | 7,052 | ||
| A1. | P. | Bulacan | Tagalog | 240,341 | 23 |
| A1. | P. | Cagayan | Ibanag, Itanes, Idayan, Gaddan, Ilocano, Dadaya, Apayao,Malaneg | 64,437 | 16 |
| A2. | P. | Camarines Norte | Tagalog, Bicol | 25,372 | 7 |
| A2(?) | P. | Camarines Sur | Bicol | 81,047 | 31 |
| A3. | P. | Cavite | Spanish, Tagalog | 109,501 | 17 |
| A1. | P. | Ilocos Norte | Ilocano, Tinguian | 134,767 | 12 |
| A1. | P. | Ilocos Sur | Ilocano | 105,251 | 18 |
| C. | D. | Infanta | Tagalog | 7,813 | 2 |
| G. | P. | Isabela | Ibanag, Gaddan, Tagalog | 29,200 | 9 |
| A1. | P. | Laguna | Tagalog, Spanish | 121,251 | 25 |
| D. | Lepanto | Igorot, Ilocano | 8,851 | 48 | |
| 3A1. | P. | Manila | Tagalog, Spanish, Chinese | 323,683 | 23 |
| C. | D. | Morong | Tagalog | 44,239 | 12 |
| A2. | P. | Nueva Ecija | Tagalog, Pangasinan, Pampangan, Ilocano | 84,520 | 12 |
| A3. | P. | Nueva Vizcaya | Gaddan, Ifugao, Ibilao, Ilongote | 32,961 | 8 |
| A1. | P. | Pampanga | Pampangan, Ilocano | 193,423 | 24 |
| A1. | P. | Pangasinan | Pangasinan, Ilocano | 253,472 | 25 |
| D. | Porac | Pampangan | 6,950 | 1 | |
| C. | D. | Principe | Tagalog, Ilocano, Ilongote | 3,609 | 3 |
| D. | Saltan | Gaddan | 6,540 | ||
| A2. | P. | Tayabas | Tagalog, Bicol | 93,918 | 17 |
| D. | Tiagan | Different Igorot dialects | 5,723 | ||
| G. | P. | Union | Ilocano | 88,024 | 11 |
| A2. | P. | Zambales | Zambal, Ilocano, Acta, Pampangan, Tagalog, Pangasinan | 72,936 | 16 |
Bisayas.