The Evangelical-Lutheran Church in Denmark or National Church (Danish: Folkekirken lit. 'the People's Church', or unofficially den danske folkekirke, 'the Danish People's Church'; Greenlandic: Ilagiit lit. 'the Congregation'), sometimes called the Church of Denmark, is the established, state-supported church in Denmark. The supreme secular authority of the church is composed of the reigning monarch and Denmark's Parliament, the Folketing. As of 2025, 70.7% of the population of Denmark are members, though membership is voluntary.

Chalcedonian Christianity was introduced to Denmark in the 9th century by Ansgar, Archbishop of Hamburg-Bremen. In the 10th century, King Harald Bluetooth became Christian and began organizing the church, and by the 11th century, the country was fully Christianized. Since the Reformation in Denmark, the church has been Evangelical Lutheran, while retaining much of its high church pre-Reformation liturgical traditions.

The 1849 Constitution of Denmark designated the church "the Danish people's church" and mandated that the state support it as such.

The Church of Denmark continues to maintain the historical episcopate. Theological authority is vested in bishops: ten bishops in mainland Denmark and one in Greenland, each overseeing a diocese. The bishop of Copenhagen is primus inter pares.

The Church of Denmark is organized into eleven dioceses, each led by a bishop, including one for Greenland (the Faroe Islands was a twelfth diocese until 29 July 2007). The most senior bishop (primus inter pares) is the bishop of Copenhagen, currently Peter Skov-Jakobsen. The further subdivision includes 111 deaneries and 2,200 parishes. There are about 2,400 ordained pastors (Danish: præst).

Each parish has a parochial council, elected by church members in four-year terms. The parochial council leads the practical business of the local church and decides employment of personnel, including the pastors, musicians, verger, and sacristan. The pastor (Danish: præst) is subordinate to the council, except in spiritual matters such as conducting church services and pastoral care. Parishes in the same local area are grouped into deaneries, with one priest serving as Rural Dean. Deaneries, parochial councils, and pastors are all subordinate to the bishop of the diocese.

A special feature is the possibility of creating voluntary congregations (valgmenighed) within the Church. These account for a few percent of church members. They are voluntary associations, electing their own parochial council and parish pastor, whom they agree to pay from their own pockets. In return, they are exempt from church tax. The voluntary congregation and its pastor are subordinate to the bishop of the diocese, and members remain full members of the Church. Historically, when a parish was dominated by a conservative majority and priest, the liberal minority would often set up a voluntary congregation with their own priest – and vice versa. Today the voluntary congregations are often a solution for people who find the idea of a free church appealing, but wish to keep some bonds to the church.

Another, less commonly used feature is parish optionality (sognebåndsløsning, literally "parish bond release"). If a Church member is dissatisfied with the particular pastor of his residence parish, he may choose to be served by another pastor who matches better with his Christian views.