Mercedes de Lasala de Riglos or (incorrectly) Ana Lasala de Riglos (23 September 1764 – 1 January 1837), known as Madame Riglos, was an Argentinian patriot and socialite during the period when Argentina was gaining its independence from Spain.
Her home was a meeting place where information could be exchanged and the issues of the day discussed.
In 1823 she was one of the founders of the famous philanthropic society Sociedad de Beneficencia de Buenos Aires and served as its first president.