Assi - Babe
- Assicus, Saint
- Assideans
- Assimilation, Physiological
- Assimilation, Psychological
- Assisi
- Assistant at the Pontifical Throne
- Assistant Priest
- Assizes of Jerusalem
- Assmayer, Ignaz
- Association of Ideas
- Association of Priestly Perseverance
- Association of the Holy Childhood
- Association, Right of Voluntary
- Associations, Pious
- Assuerus
- Assumption of Mary
- Assumption, Augustinians of the
- Assumption, Little Sisters of the
- Assumption, Sisters of the
- Assumptionists