Princess Maria Anna of Bavaria (German: Maria Anna Leopoldine Elisabeth Wilhelmine von Bayern; 27 January 1805 – 13 September 1877) was Queen Consort of Saxony from 1836 to 1854.

Maria Anna was born in Munich, the daughter of Maximilian I Joseph of Bavaria and his second wife Karoline of Baden. She was the identical twin sister of Princess Sophie of Bavaria, mother of Emperor Franz Joseph I of Austria and Emperor Maximilian I of Mexico.

On 24 April 1833 in Dresden, Maria married Crown Prince Frederick of Saxony, whose brother Prince John of Saxony was married to her sister Amalie and who had been widowed the year before. In 1836, Frederick succeeded his uncle Anthony as king, making her queen. There were no children from the marriage. King Frederick Augustus II died in 1854.

In 1836, during the great famine of Erzgebirge and Vogtland in Saxony, Maria Anna organized the first women committees to help, "Frauenvereinsanstalt der obererzgebirgischen und vogtländischen Frauenvereine" - this was in 1859 named to "Zentralausschuß der obererzgebirgischen und vogtländischen Frauenvereine" and existed until 1932. She constructed the chapel Gedächtniskapelle in 1855. She is known as the correspondent of the writer Ida von Hahn-Hahn (1805–1880).

Maria Anna died in Wachwitz, Dresden, aged 72.

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