Sir Robert David "Rob" Muldoon, GCMG, CH, PC (September 25, 1921 – August 5, 1992), serves as the 31st Prime Minister of New Zealand from 1975 to 1984, as leader of the governing National Party.

Muldoon had been a prominent member of the National party and MP for the Tamaki electorate for some years prior to becoming leader of the party.

During his time as a member of parliament and as Prime Minister, Muldoon is responsible for a number of major changes to the New Zealand economy, including the introduction of decimal currency and the Think Big policies of the third National Government.

Despite being a polarizing figure during his time as Prime Minister, Muldoon's impact on New Zealand society fades after his retirement.