The 2nd New Zealand Parliament was a term of the Parliament of New Zealand. It opened on 15 April 1856, following New Zealand's 1855 election. It was dissolved on 5 November 1860 in preparation for 1860–61 election. The 2nd Parliament was the first under which New Zealand had responsible government, meaning that unlike previously, the Cabinet was chosen by Parliament rather than by the Governor-General of New Zealand.

The New Zealand Parliament is the unicameral legislature of New Zealand, consisting of the Sovereign (King-in-Parliament) and the New Zealand House of Representatives. The King is usually represented by his governor-general. Before 1951, there was an upper chamber, the New Zealand Legislative Council. The New Zealand Parliament was established in 1854 and is one of the oldest continuously functioning legislatures in the world. It has met in Wellington, the capital of New Zealand, since 1865.