Populatio, Female (persons)
| 2005 | 2010 | 2011 | 2012 | 2013 |
| Atlantique | 451,960 | 529,636 | 546,492 | 563,877 | 581,818 |
| Oueme | 417,701 | 489,048 | 504,563 | 520,607 | 537,250 |
| Borgou | 397,695 | 466,205 | 481,076 | 496,411 | 512,198 |
| Littoral | 374,268 | 436,198 | 449,355 | 462,834 | 476,885 |
| Zou | 348,237 | 408,774 | 421,943 | 435,520 | 449,527 |
| Couffo | 307,794 | 361,509 | 373,220 | 385,323 | 397,810 |
| Atacora | 306,010 | 359,669 | 371,334 | 383,355 | 395,702 |
| Collines | 300,861 | 352,880 | 364,231 | 375,947 | 388,008 |
| Alibori | 286,525 | 336,040 | 346,837 | 357,959 | 369,371 |
| Plateau | 234,613 | 275,197 | 284,019 | 293,151 | 302,602 |
| Mono | 202,768 | 237,929 | 245,609 | 253,565 | 261,766 |
| Donga | 191,428 | 224,484 | 231,707 | 239,185 | 246,878 |