Anton Graf Grassalkovich de Gyarak (Ürmény, 6 March 1694 – Gödöllő, 1 December 1771) was an Imperial Real Privy Councilor, President of the Royal Hungarian Court Chamber, Chief Justice of Hungary (1731–1748), and confidant of Empress Maria Theresia.
He gave up the office of Advocate General when he succeeded Count Erdődy as President of the Hungarian Court Chamber in 1748, a position he held until his death.
The Grassalkovich era was characterized by the Court Chamber's systematic efforts to organize the immigration of people willing to settle beyond the western borders of the Holy Roman Empire to colonize large parts of what was then Hungary.
In connection with this, Grassalkovich acquired extensive estates in the Pest district and, in implementing these plans, rose from humble beginnings to become one of the richest men in Hungary.
In the second half of the 18th century, Grassalkovich largely shaped the settlement and colonization policy of the Habsburg Empress Maria Theresia, of which he became a trusted advisor.