This article gives an overview of historic liberalism in New Zealand.
It is limited to liberal parties with substantial support, mainly proved by having had representation in parliament.
In New Zealand, the term "liberalism" has been used by a large variety of groups and organisations, but usually refers to a support for individual liberties and limited government.
In its extreme form it can be known as "libertarianism", although this term is used less in New Zealand than in some other countries.
However, there is (and always was) debate as to whether the Liberal Party was actually liberal—according to some observers, it would be better described as "socialist", although this was a common accusation made against early 20th century liberals, around the world.