Andrey Vasilievich Kvasov (Russian: Андрей Васильевич Квасов, ca. 1720 – ca. 1770) was a notable Baroque architect who worked in Russia including the territory of Ukraine. Very little is known about his life, and its dates are still uncertain. Only a handful of his buildings, though much altered, still stand.
Kvasov's younger brother Aleksei is credited with devising the general layout of Kazan (1766), Tver (1767), Astrakhan (1768), Kharkov (1768), and the Admiralty part of St Petersburg.