Maria Antonovna Naryshkina (Russian: Мария Антоновна Нарышкина; 1779–1854), born Princess Maria Czetwertyńska-Światopełk, was a Polish noblewoman who was the mistress of Tsar Alexander I of Russia for 19 years.

[1] Born into the House of Światopełk-Czetwertyński, she was the daughter of the Polish prince Antoni Stanisław Czetwertyński-Światopełk and his wife, Tekla von Kampenhausen (1750–1791).

She is described as fascinating and charming, with the ability to attract people, and called "The Aspasia of the North".

She accompanied the tsar to the Vienna Congress in 1815, which gave him bad publicity.

She also had a son, Emanuel, who wasn't admitted by her husband and was possibly also the tsar's child.