| no. | Name | census 2001 | census 2006 | calculation 2013 | area (km²) |
|---|---|---|---|---|---|
| 1 | Apia Urban Area | 38 836 | 37 237 | 35 649 | 60 |
| 2 | North West Upolu | 52 576 | 55 823 | 61 069 | 251 |
| 3 | Rest of Upolu | 42 474 | 43 023 | 43 691 | 780 |
| 4 | Savaii | 42 824 | 43 103 | 43 190 | 1 694 |
| Samoa | 176 710 | 179 186 | 183 599 | 2 785 |