Sara del Campo Yávar was First Lady of Chile from 1906 to 1910, and the wife of President Pedro Montt.
She was born in Santiago, 31 December 1855 - † Santiago 4 October 1927, she was daughter of Evaristo del Campo Madariaga and of Antonia Yávar Ruiz de Cabrera. She married Pedro Montt on January 3, 1881, but they had no descendants.