Presbyterianism is a branch of Protestant Christianity that follows the theological traditions of John Calvin and other Reformed thinkers.

It is characterized by a distinctive form of church government which is run by elected elders, presbyters.

Key doctrines include the sovereignty of God, the authority of Scripture, and the doctrine of predestination, which asserts that God has preordained some people to be saved.

Presbyterian worship is typically structured and liturgical, focusing on preaching, prayer, and the sacraments of baptism and the Lord's Supper.

The Presbyterian Church USA and the Presbyterian Church in America are two of the most prominent Presbyterian denominations in the United States, each with its own theological emphases and cultural distinctives.