The Electoral Roll is organized by electoral constituency and village. Registered electors are listed with the surname first, followed by their first names. The Final Roll for the 2025 National Election was published on 19 September 2025, listing a total of 63,484 registered voters. A Supplementary Roll will be published on 6 November 2025, which will include individuals who have not been registered and for those who turn 21 years of age between the publication of the Final Roll and two weeks before polling day.
Registered Voters: Constituency by Gender as of 19th September 2025.
| Constituency | Male | Female | Total | % |
|---|---|---|---|---|
| Tongatapu 1 | 2224 | 2402 | 4626 | |
| Tongatapu 2 | 1767 | 1996 | 3763 | |
| Tongatapu 3 | 2261 | 2372 | 4633 | |
| Tongatapu 4 | 2101 | 2262 | 4363 | |
| Tongatapu 5 | 2223 | 2370 | 4593 | |
| Tongatapu 6 | 2311 | 2461 | 4772 | |
| Tongatapu 7 | 2202 | 2427 | 4629 | |
| Tongatapu 8 | 2035 | 2150 | 4185 | |
| Tongatapu 9 | 2139 | 2161 | 4300 | |
| Tongatapu 10 | 2331 | 2390 | 4721 | |
| 21594 | 22991 | 44585 | 70.23029 | |
| Eua 11 | 1587 | 1602 | 3189 | 5.023313 |
| Haápai 12 | 1110 | 1237 | 2347 | |
| Haápai 13 | 1314 | 1281 | 2595 | |
| 2424 | 2518 | 4942 | 7.784639 | |
| Vavaú 14 | 1590 | 1629 | 3219 | |
| Vavaú 15 | 1453 | 1598 | 3051 | |
| Vavaú 16 | 1558 | 1672 | 3230 | |
| 4601 | 4899 | 9500 | 14.9644 | |
| Ongo Niua 17 | 624 | 644 | 1268 | 1.997354 |
| Tongatapu | 21594 | 22991 | 44585 | 70% |
| Vavaú | 4601 | 4899 | 9500 | 15% |
| Haápai | 2424 | 2518 | 4942 | 8% |
| Éua | 1587 | 1602 | 3189 | 5% |
| Ongo Niua | 624 | 644 | 1268 | 2% |
| Constituency | Male | Female | Total | |
| Total | 30830 | 32654 | 63484 | |
| % | 48.56342 | 51.43658 |