Hugh Watt, Australian-New Zealand engineer and politician, Prime Minister of New Zealand (died 1980)

Hugh Watt was a New Zealand politician who was a Labour member of Parliament and the acting prime minister of New Zealand between 31 August and 6 September 1974, following the death of Prime Minister Norman Kirk. He had been the fifth deputy prime minister of New Zealand since 8 December 1972. Watt later served as high commissioner to the United Kingdom.

The prime minister of New Zealand is the country's head of government and the leader of the Cabinet, whose powers and responsibilities are defined by convention. Officially, the prime minister is appointed by the governor-general, but by convention, the prime minister must have the confidence of the House of Representatives. The prime minister is always a member of parliament.