Christian denominations similar to or like American Baptist Churches USA

Largest grouping of Christians in the United States, with its combined denominations collectively comprising about 43% of the country's population in 2019. Simultaneously, this corresponds to around 20% of the world's total Protestant population. Wikipedia

Baptists in the United States make up a large number of all Baptists worldwide. Approximately 15.3% of Americans identify as Baptist, making Baptists the second largest religious group in the United States. Wikipedia

Mainline Protestant Christian denomination based in the United States, with historical and confessional roots in the Congregational, Reformed, Lutheran, and Anabaptist traditions, and with approximately 4,852 churches and 802,356 members. Historical continuation of the General Council of Congregational Christian churches founded under the influence of New England Pilgrims and Puritans. Wikipedia

Christian denomination based in the United States. World's largest Baptist denomination, the largest Protestant and the second-largest Christian denomination in the United States, smaller only than the Roman Catholic Church according to self-reported membership statistics. Wikipedia

Mainline predominantly African American Baptist denomination emphasizing civil rights and social justice. The headquarters of the Progressive National Baptist Convention are in Washington, D.C. Since its organization, the denomination has member churches outside the United States, particularly in the Caribbean and Europe. Wikipedia

Primarily African American Baptist Christian denomination in the United States. Headquartered at the Baptist World Center in Nashville, Tennessee and affiliated with the Baptist World Alliance. Wikipedia