Brethren Church (Ashland): Founded 1882, membership is estimated 13,260 (2010) to be across 106 congregations (2020).
Brethren in Christ Church: Founded in 1863, membership is estimated to be around 22,920 in 211 congregations (2015).
Church of the Brethren: Founded in 1708 , membership is estimated to be around 109,288 across 921 churches (2020).
Church of the United Brethren in Christ: Founded in 1800, membership is estimated to be around 21,222 across 160 congregations (2020).
Evangelical Congregational Church: Founded in 1894, membership is estimated to be around 13,750 across 124 congregations (2014).
Evangelical Covenant Church: Founded in 1885, membership is estimated to be 231,273 across 839 churches (2015).
Evangelical Free Church of America: Founded in 1950, membership is estimated to be 357,186 across 1,470 churches (2012).
Fellowship of Grace Brethren Churches (Charis Fellowship): Founded in 1939, membership is estimated to be 30,371 across 260 churches (2012).
Moravian Church: Founded in 1722, membership is estimated to be 32,389 in 154 churches (2020).
Old German Baptist Brethren Church: Founded in 1881 (Divided in 2009), membership is estimated to be 3,430 across 35 churches (2020).
Schwenkfelder Church: Founded in 1782,membership is estimated to be 2,471 across 4 churches (2020).