The Third National Government of New Zealand was the government of New Zealand from 1975 to 1984. It was an economically conservative government that aimed to preserve the Keynesian economic system established by the First Labour government and was also socially conservative. Throughout its three terms it was led by Robert Muldoon, a populist but antagonistic politician who was sometimes described as the National Party's best asset and worst liability.

Sir Robert David Muldoon was a New Zealand conservative politician who served as the 31st prime minister of New Zealand, from 1975 to 1984, while leader of the National Party. Departing from National Party convention, Muldoon was a right-wing populist and economic nationalist, with a distinctive public persona described as reactionary, aggressive, and abrasive.