Koonchae Christian Wittaya School is located at 388 M1. Klongkiew, Banbung Chonburi. It has an area of 5 Rai 3 Ngan 9 Wa. It started in 1970 that offers only nursery. It had 8 children and a building with two floors made of wood with the purpose of proclaiming the gospel of Jesus Christ to the students, parents and community. At that time, the school received the license from Suntirat Padoongwit School. A few years later, they changed the name of the school from Suntirat Padoongwit School to Koonchae Christian Wittaya School.
In May 17, 1974 the license had to change from Suntirat Padoongwit School to Church of Christ in Thailand.
The Baptist Missions and the member of Hua Koonchae Baptist Church contributed the first building.