Father Don Don serves as priest for the Catholic communities of Immaculate Conception church in Stratford, St Patrick's Kaponga and St Joseph's Eltham.
He says the community in Whangamomona is "wonderful" and the church has been an important part of the community through the years.
He says the mass celebrated the community as well as the building.
"The final service celebrated 100 years of the Catholic community and 100 years of the church itself."
While the church has closed, the building still stands.
"The building is being preserved. It is a good landmark for Whangamomona," Father Don Don says.