Henderson — general electorate report

Political profile & infrastructure context

2023 political profile

MP (2023): Phil Twyford

Party: Labour

Winning margin: 0.3%

Winner vote share: 37.74%

Turnout: 72.92%

Electoral population: 67,421

Marginal seat (under 5% margin) — heightened election sensitivity for local infrastructure commitments.

Infrastructure context

Pipeline projects are tracked at the regional level. See the Henderson region report and the live map for project-level exposure and completion-probability scores.

Sources & methodology. Project data from Te Waihanga's National Infrastructure Pipeline and public records. Completion Probability is a transparent heuristic (see https://nz-infrawatch.pages.dev/methodology/probability/). Approximations are flagged; no figures are fabricated. © 2026 NZ InfraWatch.