Population, Male (persons)
| 2005 | 2010 | 2011 | 2012 | 2013 |
| Atlantique | 429,956 | 509,918 | 527,218 | 545,067 | 563,477 |
| Borgou | 398,952 | 472,838 | 488,820 | 505,313 | 522,362 |
| Oueme | 386,207 | 458,555 | 474,174 | 490,248 | 506,741 |
| Littoral | 357,396 | 426,247 | 441,426 | 457,179 | 473,286 |
| Zou | 311,761 | 369,196 | 381,587 | 394,378 | 407,575 |
| Atacora | 298,393 | 352,768 | 364,511 | 376,637 | 389,203 |
| Collines | 288,698 | 342,060 | 353,540 | 365,380 | 377,619 |
| Alibori | 286,720 | 339,669 | 351,073 | 362,853 | 375,070 |
| Couffo | 269,293 | 318,729 | 329,368 | 340,321 | 351,621 |
| Plateau | 213,248 | 252,716 | 261,239 | 270,000 | 279,009 |
| Donga | 193,668 | 229,447 | 237,138 | 245,046 | 253,225 |
| Mono | 193,302 | 228,936 | 236,596 | 244,463 | 252,588 |