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- Haus Carola, Bad Waldliesborn, Lippstadt: Olpe Sisters (dates tbe)
- Beckum Abbey (Kollegiatstift St. Stephanus), Beckum: men's collegiate foundation 1267–1811
- Bedburg Abbey (Marienstift Bedburg), Bedburg-Hau: Premonstratensians, before 1138 – c. 1270; regular canonesses c. 1270–1519; secular canonesses 1517–1802; moved to Cleves in 1604
- Belecke Priory (Propstei Belecke), Belecke, Warstein: Benedictine monks 1270–1804
- Benden Abbey or Priory (Kloster Benden), Heide, Brühl: Cistercian nuns 1207–1802
- Benninghausen Abbey or Priory (Kloster Benninghausen), Benninghausen, Lippstadt: Cistercian nuns 1240–1804
- Bentlage Priory (Kloster Bentlage), Bentlage, Rheine: Canons Regular of the Order of the Holy Cross 1437–1803
- Beyenburg Abbey, see Steinhaus Abbey
- Redemptorist Fathers, Bochum
- Böddeken Abbey (or Priory), Büren: women's collegiate foundation (Frauenstift) 836 – 11th century; secular canonesses 11th century – 1408; re-founded as Augustinian Canons under the Windesheim Congregation 1408/09 – 1803
- Bödingen Priory (Kloster Bödingen), Hennef: Augustinian Hermits 1424–1803
- Boke Abbey (Kloster Boke), Boke, Delbrück: Benedictine monks 1101–1104 (moved to Flechtdorf Abbey in Hesse)
- Redemptorist Fathers, Bonn
- St. Remigius' Abbey, Borken (Kollegiatstift St. Remigius), Borken: men's collegiate foundation 1433–1811
- Bottenbroich Abbey, later Bottenbroich Priory (Kloster Bottenbroich), Kerpen: Cistercian nuns 1231 (or 1253)–1448; Cistercian monks 1448–1802
- Brauweiler Abbey (Abtei Brauweiler), Pulheim: Benedictine monks 1024–1803
- Bredelar Abbey or Priory (Kloster Bredelar), Bredelar, Marsberg: Premonstratensians, approximately 1170–1196; Cistercian monks 1196–1804
- Brenkhausen Abbey (Kloster Brenkhausen), Brenkhausen near Höxter: Cistercian nuns c1245 re-settled with Benedictine nuns from Corvey 1601–1803; from 1993 monastery and bishop's seat of the Coptic Church in Germany
- Brilon Friary (Minoritenkloster Brilon), Brilon: Friars Minor 1653–1803
- Brunnen Priory (Kloster Brunnen), Sundern: Capuchin Friars 1722–1834
- Burtscheid Abbey (Abtei Burtscheid), Burtscheid, Aachen: Benedictine monks 997–1220; Cistercian nuns 1220–1802
Read more about this topic: List Of Christian Religious Houses In North Rhine-Westphalia