Joost de Lalaing (c. 1437 – 5 August 1483 near Utrecht), lord of Montigny and of Santes, was a noble from Hainaut who filled several important posts in service of the Burgundian Dukes.

In 1468 Charles the Bold appointed him souvereign-bailiff for the County of Flanders.

From 1477 on he was chamberlain at the court of Charles' daughter, Mary of Burgundy.

When Wolfert VI of Borselen could no longer control the situation in the Holland and Zeeland, Joost was appointed stadtholder of these regions.

Joost de Lalaing died at the siege of Utrecht, during the Hook and Cod wars.