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- Mallersdorf Abbey
- Maria Enzersdorf (Lower Austria):
- Franciscan friary
- Poor Clares
- St. Gabriel's Mission House: Missionaries of the Divine Word (monks)
- Maria Plain, see Salzburg
- Maria Roggendorf, see (1) Marienfeld Priory and (2) St. Joseph's Priory
- Mariastern Abbey at Gwiggen, Hohenweiler (Vorarlberg): Cistercian nuns
- Maria Waldrast near Matrei am Brenner (Tyrol): Servite friars
- Marienfeld Priory at Marienfeld near Hollabrunn (Lower Austria): Cistercian nuns
- Marienkron Abbey at Mönchhof (Burgenland): Cistercian nuns
- Mattsee Priory at Mattsee (Salzburg): secular canons, formerly Benedictine monks
- Mauerbach Charterhouse (dissolved) at Mauerbach (Lower Austria): Carthusians
- Mehrerau Abbey, see Wettingen-Mehrerau Abbey
- Melk Abbey at Melk (Lower Austria): Benedictine monks
- Michaelbeuern Abbey at Dorfbeuern (Salzburg): Benedictine monks
- Millstatt Abbey (dissolved) at Millstatt (Carinthia): Benedictine monks; Knights of the Order of St. George; Jesuits
- Mondsee Abbey (dissolved) at Mondsee (Upper Austria): Benedictine monks
Read more about this topic: List Of Christian Religious Houses In Austria, Austria