The first time Oppuurs was mentioned was in 1414, then called "Oppuedersel". In the 15th century, it was owned by the family Van der Calsteren. Later, Joost Snoy became the owner. In 1664, it got the title of barony. At the 7th of mai 1818, Idisbalda-Ghislain Snoy was appointed to mayor by the king. Later, in 1777 the properties were bought by Philippe Ghislain Snoy, who became baron.