Frederick Hackett was a New Zealand politician of the Labour Party. He was a minister in both the First and Second Labour Governments of New Zealand and later the deputy leader of the opposition.

The First Labour Government of New Zealand was the government of New Zealand from 1935 to 1949. Responsible for the realisation of a wide range of progressive social reforms during its time in office, it set the tone of New Zealand's economic and welfare policies until the 1980s, establishing a welfare state, a system of Keynesian economic management, and high levels of state intervention. The government came to power towards the end of, and as a result of, the Great Depression of the 1930s, and also governed the country throughout World War II.