In 1864, a new congregation was organized to serve the southeastern part of Marshall County. It was named Walnut Church of the Brethren, and had 35 members. They met in homes as there was no church building.
In 1882 the congregation purchased four acres of land on the corner of 19th and Gumwood Roads for the sum of $200.00. A wooden church was built in the fall of 1883. In 1913, the wooden structure was replaced with a new brick building.
On January 22, 1944 the church building was destroyed by fire. The church history book stated, “Only the building was burned, not the church.” A new building was erected and dedicated on March 18, 1945.
Walnut Church of the Brethren has grown in numbers and in ministry. On August 27, 2023, the church voted to change the name of the church to simply Walnut Church.