| 1990 | 2000 | 2011 | |
|---|---|---|---|
| Morobe | 380 117 | 539 404 | 646 876 |
| Eastern Highlands | 300 648 | 432 972 | 582 159 |
| Southern Highlands | 317 437 | 546 265 | 515 511 |
| Madang | 253 195 | 365 106 | 487 460 |
| Enga | 235 561 | 295 031 | 452 596 |
| East Sepik | 254 371 | 343 181 | 433 481 |
| Chimbu | 183 849 | 259 703 | 403 772 |
| Western Highlands | 336 178 | 440 025 | 352 934 |
| hela | 352 698 | ||
| jiwaka | 341 928 | ||
| National Capital District | 195 570 | 254 158 | 318 128 |
| East New Britain | 185 459 | 220 133 | 271 250 |
| Milne Bay | 158 780 | 210 412 | 269 954 |
| West New Britain | 130 190 | 184 508 | 242 676 |
| Central | 141 195 | 183 983 | 237 016 |
| Bougainville | 154 000 | 175 160 | 234 280 |
| Sandaun | 139 917 | 185 741 | 227 657 |
| Western | 110 420 | 153 304 | 180 455 |
| Northern | 96 491 | 133 065 | 176 206 |
| New Ireland | 86 999 | 118 350 | 161 165 |
| Gulf | 68 737 | 106 898 | 121 128 |
| Manus | 32 840 | 43 387 | 50 321 |