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- St. Andrew's Abbey, Bruges (Abdij SintAndries Brugge) at Zevenkerken, Bruges (West Flanders): Benedictine monks
- St. Bernard's Abbey, Bornem (extant), formerly Bornem Abbey (Sint-Bernardusabdij, Bornem or Abdij van Bornem) at Bornem (Antwerp): Cistercian monks
- St. Bernard's Abbey, Hemiksem, also St. Bernard's Abbey on the Scheldt (Sint Bernaerdts op Scheldt or Sint Bernardusabdij) at Hemiksem (Antwerp) (moved to St. Bernard's Abbey, Bornem, in 1836): Cistercian monks
- Saint-Denis-en-Broqueroie Abbey (Abbaye de Saint-Denis-en-Broqueroie) at Saint-Denis, Mons (Hainaut): Benedictine monks
- St. Gertrude's Abbey (Abbaye Sainte-Gertrude de Louvain-la-Neuve) at Louvain-la-Neuve: Benedictine nuns
- see also St. Gertrude's Abbey, Leuven
- Saint-Ghislain Abbey (Abbaye de Saint-Ghislain or Saint-Pierre-Saint-Paul de la Celle) at Saint-Ghislain (Hainaut): Benedictines
- St. Godelieve's Abbey, Bruges (St. Godelieveabdij, Brugge) (extant) in Bruges (West Flanders): Benedictine nuns
- Saint-Hubert Abbey (Abbaye Saint Pierre-Saint-Paul de Saint-Hubert) at Saint-Hubert (Luxembourg): Benedictine monks
- Saint-Rémy Abbey, see Rochefort
- St. Sixtus' Abbey, Westvleteren, see Westvleteren
- Sint-Truiden (Limburg):
- St. Trudo's Abbey (Abdij van Sint-Truiden): Benedictine monks
- St. Catherine's Abbey, Sint-Truiden (Abdij Sint-Katrien van Sint-Truiden): Benedictine nuns
- Zeppern Charterhouse, see Zepperen
- St. Trudo's Abbey (Sint-Trudoabdij), Male, Bruges, West Flanders: Canonesses Regular of the Holy Sepulchre
- Salzinnes Abbey (Abbaye de Salzinnes) at Salzinnes (Namur): Cistercian nuns
- Saulchoir Abbey (Abbaye du Saulchoir) at Kain in Tournai (Hainaut): Cistercian nuns
- Scheut Charterhouse (Kartuizerkloster Scheut) at Anderlecht (Brussels): Carthusian monks
- Scourmont Abbey (Abbaye Notre-Dame de Scourmont) (extant) at Forges, Chimay (Hainaut): Trappist monks
- Sheen Anglorum, see Nieuwpoort Charterhouse
- Soleilmont Abbey (Abbaye Notre-Dame de Soleilmont) (extant) at Gilly (Hainaut): Trappist nuns
- Solières Abbey (Abbaye de Solières) at Ben-Ahin (Liège): Cistercian nuns
- Spermaillie Abbey (Abbaye de Spermaillie) at Bruges: Cistercian nuns
- Stavelot Abbey (Abbaye de Stavelot) at Stavelot (Liège): Benedictine monks
- Steenbrugge Abbey or St. Peter's Abbey, Steenbrugge (St-Pietersabdij Steenbrugge) (extant) in Assebroek, Bruges (West Flanders): Benedictine monks
Read more about this topic: List Of Christian Religious Houses In Belgium