Selwyn — general electorate report

Political profile & infrastructure context

2023 political profile

MP (2023): Nicola Grigg

Party: National

Winning margin: 40.5%

Winner vote share: 64.55%

Turnout: 85.69%

Electoral population: 62,209

Infrastructure context

Pipeline projects are tracked at the regional level. See the Selwyn 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.