Current and past members of the church community are invited to attend a celebratory worship service at 10.30am on Sunday followed by a lunch in the town hall.

Pastor Keith Pitt, who will be one of the speakers during the service, said the church expected about 180 people to attend the celebration.

He said the chief executive of the Churches of Christ conference Pastor Paul Cameron would also speak at the event.

"I don’t know what better reason for a celebration than being 150 years old and still being there," Pastor Pitt said.

After lunch the church will hold a time of reflection for people related to the original members who formed the church back in 1864.

The current chapel that houses the congregation was built in 1872.

Pastor Pitt said there were about 25 regular members of a normal Sunday, but that the building was likely to be overflowing for the celebration service.

"The church is going to squeeze them in somehow for the service, " Pastor Pitt said. He said pews had been moved around to make way for as many people as possible.

In preparation for the anniversary, members of the church have also been working on a book detailing the congregation's history. Church member Frances Pitt said the book contained the stories of hundreds of people who had a connection to the Wedderburn Church of Christ.

She said putting the book together had been a major research effort. The early history of the church is said to have started with four families who gathered to worship at home, and then established Wedderburn Church of Christ. 

"Research suggests some of these early settlers came from the area of Somerset in England and probably knew each other and colonised together," Mrs Pitt said. 

She said it would be interesting to know how many Wedderburn families were linked to the founding church members.