The 1951 New Zealand general election was a nationwide vote to determine the shape of the New Zealand Parliament's 30th term. The First National Government was re-elected, with the National Party increasing its parliamentary majority over the opposition Labour Party. This was the last time until the 2020 election that a party was elected to majority government of New Zealand by receiving a majority of the vote.

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.