The Party of Nationalists or Nationalists' Party (Persian: حزب ملیون, romanized: Ḥezb-e Melliun) was a conservative political party in Pahlavi era Iran, and government majority party from 1957 to 1960. The party was founded in 1957 by Manouchehr Eghbal on orders directed by Shah to initiate a two-party system. Its opposition was the liberal People's Party.

The party's name was deliberately chosen in a way to confuse the public, because the term Melliun (lit. 'Nationalists') was already in use to refer to members of the opposition National Front and other followers of Mohammad Mossadegh.