Veinticinco de Mayo () may refer to:
First National Government, creation of the Primera Junta in Argentina on 25 May 1810; an annual public holiday
Places Argentina Veinticinco de Mayo Partido, Buenos Aires Province Veinticinco de Mayo, Buenos Aires, a city in Buenos Aires Province Veinticinco de Mayo Department, Chaco, Chaco Province Veinticinco de Mayo (Misiones), a municipality in Misiones Province Veinticinco de Mayo Department, Misiones, Misiones Province Veinticinco de Mayo Department, Río Negro, Río Negro Province Veinticinco de Mayo, La Pampa, a town in La Pampa Province 25 de Mayo station, Mendoza Province
Uruguay Veinticinco de Mayo, Uruguay, a town in Florida Department
Ships of the Argentine Navy ARA Veinticinco de Mayo, a set index of Argentine Navy ships, including: ARA Veinticinco de Mayo (1890), a protected cruiser in service 1891–1921 ARA Veinticinco de Mayo (C-2), a cruiser in service 1931–1960 ARA Veinticinco de Mayo (V-2), an aircraft carrier in service 1969–1997