Libertarianz is a political party in New Zealand (hence the suffix -nz) that advocates libertarianism, favouring self-government and limiting the power of the government over the individual^{[citation needed]}. Ayn Rand's philosophy of Objectivism is a major influence on the party^{[citation needed]}. Its slogan, "More Freedom, Less Government", is indicative of the party's basic policy platform.

Libertarianz was founded in late 1995 by Ian Fraser, who served as the party's first leader. Later, Lindsay Perigo, a well-known New Zealand broadcaster for Radio New Zealand and TVNZ, assumed the leadership. Perigo was followed as leader by Peter Cresswell and then Russell Watkins. The current leader is Richard McGrath, and the Party president is Shane Pleasance.

The party's first campaign was the 1996 election, the first to be held under the MMP electoral system. Libertarianz's involvement in the election produced negligible public interest. They gained 671 votes (0.03%), which placed them in 19th place. In the 1999 elections, the party performed somewhat better, gaining 5,949 votes (0.29%). This put them in 11th place, and in fourth place among the parties which did not gain seats in parliament. Libertarianz did not contest the party vote in the 2002 elections - due to an oversight, the party's bank cheque was not transmitted to the electoral authorities by the appointed time. The party was therefore able to contest the election only through individual electorate candidates. Its five candidates gained 672 votes amongst them.