In 1850 Presbyterians and Congregationalists opened mission in Mosul. The Arabian mission of the Reformed Church in America started in 1889 in Basra, during the 1920s the Evangelical and Reformed Church and the United Presbyterian Church supported this effort. This united mission was joined with the Southern Presbyterian Church in 1957. Main field was the education, there was little success on church planting. There was 4 Reformed-Presbyterian congregation in Baghdad, Kirkuk, Basra and Mosul served by Egyptian pastors. In 1969 all missionaries were expelled from Iraq, their schools were closed. The exact number of churches and adherents are unknown.
In 2001 the Evangelical church had 5 congregations and opened a Christian school. These are :
These churches recently formed the Assembly of Presbyterian Churches of Iraq. It was formally recognised by the Iraqi government. The PC (USA) helps to form relationships with the Evangelical Presbyterian Church of Egypt, the Reformed Church in Kuwait, National Evangelical Synod of Syria and Lebanon.
Evangelical churches have experienced a rapid growth and revival. Since the fall of the Saddam Hussein regime, 15 evangelical congregation was started.
Officially two evangelical churches, both Presbyterian, operated during the Baath regime. But now, there are Baptists, Methodists, Christian Alliance denominations as well.
Most of the new evangelical members come from the Presbyterian church, and from the historic Syrian Catholic denominations.