Mainline Protestantism is a branch of Protestantism encompassing what are considered theologically liberal and moderate denominations, such as the Presbyterian Church (USA), the United Methodist Church, The Reformed Church in America, the Episcopal Church, the United Church of Christ, and the Evangelical Lutheran Church in America. While Mainline Protestantism is usually seen as more theologically and socially liberal than Evangelical Protestantism, there is obviously variation between denominations, congregations, and individuals within the "Mainline" category.

Listing

The following 23 Mainline Protestant denominations are included in the Religious Congregations & Membership Study 2010.

• Alliance of Baptists
• American Baptist Churches in the USA
• Christian Church (Disciples of Christ)
• Congregational Christian Churches, Additional (not part of any national CCC body)
• Episcopal Church
• Evangelical Lutheran Church in America
• Friends General Conference
• Friends General Conference and Friends United Meeting, dually aligned meetings
• Friends United Meeting
• Grace Brethren Churches, Fellowship of
• Hungarian Reformed Churches (Additional)
• Independent Yearly Meetings of Friends
• International Council of Community Churches

• Metropolitan Community Churches, Universal Fellowship of
• Moravian Church in America--Alaska Province
• Moravian Church in America--Northern Province
• Moravian Church in America--Southern Province
• National Association of Congregational Christian Churches
• Presbyterian Church (U.S.A.)
• Reformed Church in America
• Unaffiliated Friends Meetings
• United Church of Christ
• United Methodist Church, The