 Total NZ by region/constituency | | 4,900,600 | 4,979,200 | 5,090,200 | 5,111,400 | 5,124,100 |
| Northland region | | 185,800 | 189,100 | 194,600 | 198,900 | 201,500 |
| Auckland region | | 1,654,800 | 1,681,300 | 1,714,200 | 1,704,100 | 1,695,200 |
| Waikato region | | 475,600 | 485,700 | 500,100 | 508,400 | 513,800 |
| Bay of Plenty region | | 320,800 | 328,200 | 339,200 | 344,000 | 347,700 |
| Gisborne region | | 49,500 | 50,200 | 51,400 | 51,800 | 52,100 |
| Hawke's Bay region | | 172,400 | 174,900 | 180,000 | 181,800 | 182,700 |
| Taranaki region | | 121,200 | 123,100 | 125,200 | 126,500 | 127,300 |
| Manawatu-Whanganui regio | | 247,500 | 250,600 | 254,600 | 256,800 | 258,200 |
| Wellington region | | 525,900 | 532,600 | 542,100 | 543,700 | 543,500 |
| Tasman region | | 54,000 | 54,900 | 57,300 | 58,100 | 58,700 |
| Nelson region | | 52,700 | 53,400 | 54,900 | 54,700 | 54,500 |
| Marlborough region | | 48,700 | 49,300 | 51,300 | 51,600 | 51,900 |
| West Coast region | | 32,400 | 32,500 | 32,800 | 32,900 | 32,700 |
| Canterbury region | | 622,800 | 631,700 | 644,000 | 650,200 | 655,000 |
| Otago region | | 235,000 | 239,400 | 245,000 | 244,600 | 246,000 |
| Southland region | | 100,500 | 101,600 | 102,800 | 102,500 | 102,400 |
| Area outside region | | 690 | 710 | 750 | 780 | 800 |
| Total North Island regions | | 3,753,700 | 3,815,700 | 3,901,300 | 3,916,000 | 3,922,000 |
| Total South Island regions | | 1,146,200 | 1,162,800 | 1,188,100 | 1,194,600 | 1,201,300 |