The Portuguese Republican Party (Portuguese: Partido Republicano Português, pronounced: [pɐɾˈtiðu ʁɛpuβliˈkɐnu puɾtuˈɣeʃ]) was a Portuguese political party formed during the late years of monarchy that proposed and conducted the substitution of the Constitutional Monarchy by the Portuguese First Republic.
When the Republic was established on October 5, 1910, the members of the party initially stood together, but a few years later began dividing themselves into multiple parties like the Democratic Party, Democratic Leftwing Republican Party, Reformist Party, Republican Union Party (Unionist Party/Republican Union), Evolutionist Republican Party, Centrist Republican Party, Popular Party, Radical Party, Liberal Republican Party, Liberal Republican Union, National Reconstitution Republican Party and Nationalist Republican Party.