Sint-Laureins (; Dutch for Saint Lawrence) is a municipality located in the Flemish province of East Flanders, in Belgium. The municipality comprises the towns of , Sint-Laureins proper, , and Watervliet. In 2021, Sint-Laureins had a total population of 6,919. The total area is 74.50 km<sup>2</sup>.
The Our Lady-Church in Watervliet, built in the 16th century, is called the 'Cathedral of the North'.