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 delivery-confidence scores.

Sources & methodology. Project data from Te Waihanga's National Infrastructure Pipeline and public records. The Delivery Confidence Score is a transparent ranking (see https://www.infrawatch.nz/methodology/delivery-confidence/). Approximations are flagged; no figures are fabricated. © 2026 NZ InfraWatch.