Rule of Saint Augustine in the context of Santo Stefano, Venice

Augustinians are members of several religious orders that follow the Rule of Saint Augustine, written about 400 A.D. by Augustine of Hippo. There are two distinct types of Augustinians in Catholic religious orders dating back to the 12th–13th centuries:

• Various congregations of Canons Regular follow the Rule of Saint Augustine, embracing the evangelical counsels and leading a semi-monastic life, while remaining committed to pastoral care appropriate to their primary vocation as priests. They generally form one large community which might serve parishes in the vicinity, and are organized into autonomous congregations.
• Several orders of friars who live a mixed religious life of contemplation and apostolic ministry. The largest and most familiar is the Order of Saint Augustine (O.S.A.), founded in 1244 and originally known as the Hermits of Saint Augustine (O.E.S.A.). They are commonly known as the Austin Friars in England. Two other orders, the Order of Augustinian Recollects (O.A.R.) and the Discalced Augustinians (O.A.D.), were once part of the original Order under a single Prior General. The Recollects, begun in 1588 as a reform movement in Spain to recover the Order's eremitical roots, became autonomous in 1612. At the 100th General Chapter of the Order held in Rome in May 1592, those seeking reform of their way of life came to be called the Discalced (barefoot) and were authorized to seek their goals as an semi-independent branch. They were raised to the status of a separate mendicant Order in 1610.

There are also some Anglican religious orders created in the 19th century that follow Augustine's rule. These are composed only of women in several different communities of Augustinian nuns.

The Order of Saint Augustine (Latin: Ordo Fratrum Sancti Augustini), abbreviated OSA, is a mendicant religious order of the Catholic Church. It was founded in 1244 by bringing together several eremitical groups in the Tuscany region who were following the Rule of Saint Augustine, written by Augustine of Hippo in the fifth century.

They are also commonly known as the Augustinians, Austin friars, or Friars Hermits and, until 1968, as the Order of Hermits of Saint Augustine (Latin: Ordo eremitarum sancti Augustini; abbreviated O.E.S.A).

The Canons Regular of the Holy Cross of Coimbra (abbreviated ORC) are a Catholic religious order of canons regular founded in Portugal in the 12th century. The ORC follows the Rule of Saint Augustine.

Religious institutes generally follow a rule of life, i.e., one of the great religious rules as guidance to their life and growth in their religious journey. These are: the Rule of St. Basil, the Rule of Saint Benedict, the Rule of Saint Augustine, and the Rule of Saint Francis. Additionally many institutes follow the Rule of Saint Albert of the Carmelites or the one followed by the Order of Preachers.

The Rule of St. Basil, credited to the 4th century bishop Basil of Caesarea and one of the earliest rules for Christian monastic life, is followed primarily by monastic communities of the Eastern Christian tradition. Most Western monastics (Benedictines, Cistercians, Trappists, Carthusians etc.) observe the Rule of Saint Benedict, a collection of precepts for what is called contemplative religious life written by Benedict of Nursia. The Rule of Saint Augustine stresses self-denial, moderation, and care for those in need.

The Bridgettines, or Birgittines, formally known as the Order of the Most Holy Saviour (Latin: Ordo Sanctissimi Salvatoris; abbreviated OSsS), is a monastic religious order of the Catholic Church founded by Saint Birgitta (Bridget of Sweden) in 1344 and approved by Pope Urban V in 1370. They follow the Rule of Saint Augustine. There are today several different branches of Bridgettines.

The Latin Rule was a document with 72 clauses attributed to Bernard de Clairvaux and Hugues de Payens. It is also known as the "Specific Behavior for the Templar Order". It outlines the ideal behavior of a knight.

The rule borrowed from the Rule of Saint Augustine, but was mostly inspired by the Rule of Saint Benedict (Latin: Regula Sancti Benedicti). It was, however, adapted for use by active, primarily military, knights, rather than cloistered monks. For example, the fasts were less severe so that they did not interfere with combat.