The first lady of Mexico (Spanish: Primera Dama de México) or first gentleman of Mexico (Spanish: Primer Caballero de México) is the informal title held by the spouse of the president of Mexico, concurrent with the president's term of office.
The position has no legal foundation and was originally started as a courtesy title. However, several holders of the title have taken on ceremonial roles during the presidential tenure of their spouses and have used the position to advocate for various causes.
