Porirua City Councillor Mike Duncan has died suddenly, according to Stuff and Porirua News, both reporting on 14 June 2026.

Duncan, who represented the Onepoto ward on Porirua City Council, had held his seat since 2016 — a decade of continuous local service. He was from Tītahi Bay, in the western part of Porirua. No cause of death has been publicly confirmed.

Mayor Anita Baker said the news had "come as a shock to all." Her statement, brief and unembellished, reflected what local government deaths of this kind almost always are: unexpected, with councils given no transition time and no playbook for the immediate days that follow.

Duncan's decade on the council spanned a period of considerable change for Porirua — population growth, significant infrastructure questions, and the pressures placed on smaller territorial authorities by Three Waters reform and its aftermath. The Onepoto ward, which takes in Tītahi Bay and surrounding areas, has specific coastal and community infrastructure concerns that require continuity of local knowledge to navigate well. Duncan brought that continuity.

Under the Local Electoral Act 2001, a casual vacancy on a council is triggered when a member dies in office. Porirua City Council will need to follow the prescribed process — public notice of the vacancy, and a decision by the council on whether to fill the seat by a by-election or by appointment, depending on the time remaining in the electoral term. The current triennium runs to October 2025 — with the 2025 local elections having returned members for the 2025–2028 term, the council will need to assess how much of that term remains and whether the threshold for a by-election is met. That determination will come in the days ahead.

The loss of an experienced ward member mid-term is not merely procedural. Institutional knowledge — committee relationships, community contacts, the informal working of a council — does not transfer automatically to whoever fills the vacancy. For a council the size of Porirua's, the gap is felt immediately.