Sint-Maria-Oudenhove is a village in the Denderstreek and in the Flemish Ardennes, the hilly southern part of the province of East Flanders, Belgium.

[1] From the middle of the 12th century, Sint-Maria-Oudenhove was part of the Land of Aalst in loan by the Lords of Zotegem.

The original castle was plundered and set on fire by the troops of Louis XIV during the War of Devolution in 1667.

In 1933, the castle was bought by the sisters of Saint Francis of Opbrakel and turned into a girl boarding school.

The municipality was home to 2,971 people and covered an area of 8.91 square kilometres (3.44 sq mi).