More than 10,000 people marched across five New Zealand cities on 14 June 2026 to protest a bill introduced by NZ First. The bill would add new legal definitions: 'woman' as 'an adult human biological female' and 'man' as 'an adult human biological male'.

Right now, the bill is being reviewed by a select committee — a small group of MPs who examine bills before Parliament votes on them. Members of the public can submit their views on the bill during this phase. Auckland had the biggest turnout, according to NZ Herald reporting from 12 June.

Protest organisers say the bill would leave transgender people without legal recognition. They say they will keep campaigning until the bill is stopped, according to RNZ. The core question is simple: if law defines 'woman' and 'man' only by biology, does that remove legal protections from people whose gender identity differs from their sex at birth?

NZ First says no — they say the bill actually clarifies the law. They point out that New Zealand law currently uses 'woman' and 'man' in inconsistent ways without clear definitions, which creates confusion in areas like sports rules and who can access single-sex services. Opponents say that making biology the only legal definition will strip away protections that transgender New Zealanders now have.

This type of bill moves slowly through Parliament. First it goes through the select committee process, including public submissions. Then, if it advances, it faces debate and votes in the House. Right now, no one knows whether it will pass. NZ First introduced the bill, but it needs support from coalition partners like National and ACT to become law. Neither of those parties has publicly said they will back the bill as it stands.

What's notable is the number of people who have already organised against the bill — before Parliament has even voted on it. This kind of street pressure can influence how MPs decide to vote, and coalition parties will have to weigh the political cost of their decision carefully as the select committee process continues.

If you want to have your say, the bill is still open to public submissions — a formal way to send your views directly to Parliament.