Religious communism is a form of communism that incorporates religious principles. Scholars have used the term to describe a variety of social or religious movements throughout history that have favored the common ownership of property. There are many historical and ideological similarities between religious communism and Liberation Theology.

The term religious communism has been used to describe a variety of social or religious movements throughout history. The "commune of early christians at Jerusalem" has been described as a group that practiced religious communism. The teachings of Mazdak, a religious proto-socialist Persian reformer, have also been referred to as early communism. According to Ben Fowkes and Bulent Gokay, Bolshevik Mikhail Skachko stated at the Congress of the Peoples of the East that "the Muslim religion is rooted in principles of religious communism, by which no man may be a slave to another, and not a single piece of land may be privately owned."

T. M. Browning described religious communism as a form of communism that "springs directly from principles native to a religion", and Hans Hillerbrand defined religious communism as religious movements that advocated the "communal ownership of goods and the concomitant abrogation of private property". Browning and Hillerbrand distinguished religious communism from political communism, as well as from economic socialism. Additionally, Hillerbrand contrasts religious communism with Marxism, which he describes as an ideology that called for eliminating religion. Donald Drew Egbert and Stow Persons argued that "[c]hronologically, religious communism tended to precede secular [communism]." Other scholars suggested that the traditional political communism, or Marxism, has always been a variety of religion.

In Christian Europe, communists were believed to have adopted atheism. In Protestant England, communism was too close to the Catholic communion rite, and socialist was the preferred term. Friedrich Engels argued that in 1848, when The Communist Manifesto was published, socialism was respectable in Europe while communism was not. The Owenites in England and the Fourierists in France were considered respectable socialists, while working-class movements that "proclaimed the necessity of total social change" denoted themselves as communists. This branch of socialism produced the communist work of Étienne Cabet in France and Wilhelm Weitling in Germany.

Some scholars have used religious communism to describe some 17th-century Protestant movements that "disavow[ed] personal property". Bhabagrahi Misra and James Preston described the "religious communism of the Shakers" as a "community in which all goods are held in common". Larry Arnhart described "religious communism in the Oneida Community" as a system where "[e]xcept for a few personal items, they shared all their property". Albert Fried wrote that "American religious communism reached its apogee" in the 1850s "[w]ith the rise of the Oneida community".

According to Rod Janzen and Max Stanton, the Hutterites believed in strict adherence to biblical principles and "church discipline" and practiced a form of communism. The Hutterites "established in their communities a rigorous system of Ordnungen, which were codes of rules and regulations that governed all aspects of life and ensured a unified perspective. As an economic system, Christian communism was attractive to many of the peasants who supported social revolution in sixteenth century central Europe" such as the German Peasants' War and "Friedrich Engels thus came to view Anabaptists as proto-Communists".

Other scholars have used the term religious communism to describe a communist social movement that developed in Paris in the 1840s, which was organized by "foreign-born, primarily German-speaking, journeyman-artisans who had settled there". In the early 20th century, before the rise of Bolshevism in Russia, some intellectuals advocated for implementing a form of communism that incorporated Christian ideology "as an alternative to Marxism". Additionally, some Catholic theologians organized groups in the late 20th century to create a dialogue between the Catholic Church and the Communist Party of Italy.

The teachings of Jesus are frequently described as communist by religious Christian communists and other communists. Acts 4:35 records that the early church in Jerusalem, "[n]o one claimed that any of their possessions was their own"; the pattern would later disappear from church history except within monasticism. Christian communists view the early Christian Church, as described in the Acts of the Apostles, as an early form of communism and religious socialism. The view is that communism was just Christianity in practice, and Jesus was the first communist. This link was highlighted in one of Karl Marx's early writings, which stated that "[a]s Christ is the intermediary unto whom man unburdens all his divinity, all his religious bonds, so the state is the mediator unto which he transfers all his Godlessness, all his human liberty." Thomas Müntzer led a significant Anabaptist communist movement during the 16th-century German Peasants' War, which Friedrich Engels analyzed in The Peasant War in Germany. The Marxist ethos that aims for unity reflects the Christian universalist teaching that humankind is one and that there is only one god who does not discriminate among people.