Count Carlo Archinto (30 July 1669 – 17 December 1732) was an Italian aristocrat and patron of the arts.
He travelled as a young man through France, Germany, Holland, and his native Italy and returned in Milan in 1700.
He formed a very choice library in his palace, which he enriched with a rare collection of mathematical instruments.
He collaborated with Filippo Argelati to publish the epic history by Muratori, titled Rerum italicarum scriptores.
Carlo Archinto wrote several works both in Latin and Italian; one, the annotations on the Third, Fourth, and Fifth Books of the Histories of Arnulf of Milan, is published in fourth volume of the Rerum italicarum scriptores, and some tables of the sciences were published anonymously at Venice after the anthor's death, under the title Tabulæ precipua Scientiarum et Artium Capita digesta per Ordinem repræsentantes.