The Federalist Party (Partito Federalista) was a federalist Italian political party.
It was launched as Federalist Union (Unione Federalista) on 1 June 1994 by Gianfranco Miglio, an influent Senator and political scientist who left Lega Nord in May over disagreements with Umberto Bossi, and Umberto Giovine, an ex-Socialist who was at the time member of Forza Italia. In July 1995 the group was strengthened by the joining of eleven deputies: all former members of Lega Nord, who had previously joined the Federalist Italian League and the Federalists and Liberal Democrats. This made possible the establishment of a sub-group within the Mixed Group in the Chamber.
The party was officially founded, changing its denomination, on 17 December 1995. At the founding congress in Milan also Vittorio Sgarbi, art critic and maverick politician, joined the party. The program of the party included the idea of transforming Italy in a federal State, modelled onto the examples of Switzerland and the United States, composed by three cantons (Padania, Etruria and Mediterranea) and the five existing autonomous regions. The federation would have been presided by a strong President.