Margherita Carossio-Monti (10 August 1905 – 30 June 2017) was an Italian-born Argentinian supercentenarian who is currently unverified.
Margherita was born as Margherita Carossio in Mombaruzzo, Piedmont, Italy. She moved with family to Argentina at age of 3, on ship named "Rey Victorio". They moved to San Martin, Buenos Aires. She married an Italian immigrant, Eduardo Monti. With her husband she moved to Mar del Plata, Buenos Aires, where she lived until her death. They had two children: Nelida and Roberto.
Margherita Carossio-Monti passed away in Buenos Aires, Argentina, at the age of 111 years, 324 days.