Connexionalism, also spelled connectionalism, is the theological understanding and foundation of Methodist ecclesiastical polity, as practised in the Methodist Church in Britain, Methodist Church in Ireland, United Methodist Church, Free Methodist Church, African Methodist Episcopal Church, African Methodist Episcopal Zion Church, Bible Methodist Connection of Churches, Christian Methodist Episcopal Church, Methodist Church in the Caribbean and the Americas, and many of the countries where Methodism was established by missionaries sent out from these churches. It refers to the way in which Methodist churches and other institutions are connected and work together to support one another, share resources, and carry out mission and ministry. The United Methodist Church defines connection as the principle that "all leaders and congregations are connected in a network of loyalties and commitments that support, yet supersede, local concerns." Accordingly, the primary decision-making bodies in Methodism are conferences, which serve to gather together representatives of various levels of church hierarchy.

In the United Methodist Church and Free Methodist Church, where bishops provide church leadership, connexionalism is a variety of episcopal polity. Many Methodist churches, such as the British Methodist Church, do not have bishops. In world Methodism, a given connexion (that is, denomination) is usually autonomous.