Marie of Artois (1291-1365) was the margravine of Namur in 1310-1330 by marriage to John I. She was the regent of Namur during the minority of her son William I in 1337-1340.
She became the lady of Méraude (Merode) when she purchased it from King John of Bohemia in 1342, until she left it to her son William I in 1353.
She was the fourth daughter of Philip of Artois and Blanche of Brittany.
Marie married Marquis John I of Namur. They were married by contract in Paris on 6 March 1310, confirmed in Poissy, January 1313. John granted her as dower the castle of Wijnendale in Flanders, ratified by John's half-brother Count Robert III of Flanders in 1313.
She became a widow in 1330.
In 1337, her youngest fifth son became marquis. Since he was fifteen and a minor, she became regent of Namur until her reached his majority.