Bois-Seigneur-Isaac Castle is a stately home in Ophain-Bois-Seigneur-Isaac, part of the commune of Braine-l'Alleud, Walloon Brabant, Belgium. The present building dates from 1737, but the site is substantially older.
Associated with the House of Snoy, the château's notable residents include the diplomat Jean-Charles Snoy et d'Oppuers,
Address 1421, Belgium
Coordinates 50°38'31.622" N 4°19'26.982" E