| 2005 | 2010 | 2011 | 2012 | 2013 | |
|---|---|---|---|---|---|
| Mainland | 45 007 503 | ||||
| Shinyanga Region | 3 149 179 | 3 841 788 | 3 998 664 | 4 161 091 | 4 329 198 |
| Mwanza Region | 3 073 881 | 3 566 263 | 3 669 380 | 3 771 067 | 3 873 866 |
| Dar Es Salaam Region | 2 721 926 | 3 118 132 | 3 194 903 | 3 270 255 | 3 344 031 |
| Mbeya Region | 2 270 711 | 2 662 157 | 2 743 084 | 2 822 396 | 2 901 949 |
| Kagera Region | 2 130 668 | 2 563 870 | 2 661 671 | 2 763 329 | 2 868 686 |
| Tabora Region | 1 925 106 | 2 349 374 | 2 443 049 | 2 539 715 | 2 639 473 |
| Dodoma Region | 1 843 169 | 2 111 763 | 2 163 817 | 2 214 657 | 2 264 117 |
| Morogoro Region | 1 883 437 | 2 115 275 | 2 162 197 | 2 209 072 | 2 255 871 |
| Tanga Region | 1 753 284 | 1 966 908 | 2 010 480 | 2 054 042 | 2 097 773 |
| Kigoma Region | 1 473 100 | 1 814 158 | 1 891 173 | 1 971 332 | 2 054 583 |
| Mara Region | 1 515 358 | 1 822 866 | 1 891 907 | 1 963 460 | 2 037 621 |
| Iringa Region | 1 585 501 | 1 737 382 | 1 764 285 | 1 789 779 | 1 813 793 |
| Arusha Region | 1 428 034 | 1 664 780 | 1 711 624 | 1 758 196 | 1 804 467 |
| Kilimanjaro Region | 1 470 168 | 1 635 870 | 1 669 174 | 1 702 207 | 1 734 822 |
| Rukwa Region | 1 256 828 | 1 503 183 | 1 558 200 | 1 615 098 | 1 673 954 |
| Manyara Region | 1 156 334 | 1 388 295 | 1 441 771 | 1 497 555 | 1 555 742 |
| Ruvuma Region | 1 202 430 | 1 375 017 | 1 412 084 | 1 449 830 | 1 488 218 |
| Singida Region | 1 187 409 | 1 367 480 | 1 404 065 | 1 440 682 | 1 477 139 |
| Mtwara Region | 1 194 588 | 1 323 569 | 1 349 235 | 1 374 767 | 1 400 182 |
| Zanzibar | 1 348 776 | ||||
| Pwani Region | 946 158 | 1 062 574 | 1 086 658 | 1 110 917 | 1 135 274 |
| Lindi Region | 834 171 | 923 607 | 941 884 | 960 236 | 978 655 |
| Mjini Magharibi Region | 424 366 | 483 205 | 495 054 | 506 907 | 518 731 |
| Kaskazini Pemba Region | 207 773 | 253 999 | 264 677 | 275 806 | 287 368 |
| Kusini Pemba Region | 198 690 | 246 601 | 257 577 | 269 030 | 280 951 |
| Kaskazini Unguja Region | 150 143 | 177 095 | 183 209 | 189 574 | 196 178 |
| Kusini Unguja Region | 100 934 | 112 612 | 115 035 | 117 475 | 119 938 |