Anglican Communion, Roman Catholic,Eastern Orthodox, Oriental Orthodoxy, Armenian Apostolic, Assyrian, Lutherans, Presbyterians, Methodists, Nazarene, Reformed Church in America, United Church of Canada, United Church of Christ, Continental Reformed.
Most Baptists, Apostolic Christians, all Old Time Missionary Baptists, Disciples of Christ, most Pentecostals, Mennonites, Amish, Community of Christ, Plymouth Brethren, Seventh-day Adventists, most non-denominational churches, and other Arminian denominations.
God’s merciful love – grace- precedes human response and enables it. Personal confession of faith following on from and responding to the grace of God received in infant baptism is consistent with this fact.
Christ welcomed and blessed those infants that were brought to Him (Mark 10:13-15)
As a sign of belonging to the family – circumcision
Lutheran - baptism is a "means of grace" through which God creates and strengthens "saving faith" by the washing of rebirth and renewal by the Holy Spirit in which infants and adults are reborn.
Methodists - principle of prevenient grace, infant baptism is God's promise to the infant that calls that infant to (eventually) believe in God's promises (God's Word) for salvation.
As a symbol, like a wedding ring. The grace it conveys, however, is not justifying grace. Baptism, according to this tradition, does not produce Christians, but identifies the child as a member of the covenant community.