Sir Sidney George Holland was a New Zealand politician who served as the 25th prime minister of New Zealand from 13 December 1949 to 20 September 1957. He was instrumental in the creation and consolidation of the New Zealand National Party, which was to dominate New Zealand politics for much of the second half of the 20th century.

The New Zealand National Party, shortened to National or the Nats, is a centre-right New Zealand political party that is the current ruling party. It is one of two major parties that dominate contemporary New Zealand politics, alongside its traditional rival, the Labour Party.