Sunnyside Mennonite Church was born out of an outreach program of the Goshen College Young People's Christian Association. In 1946, summer Bible School and worship services were held. - This led to the formation of a small congregation and the erection of a modest building in 1947. In the early years, ministry to the children of the community was the primary focus.

The 1965 Palm Sunday tornado destroyed the church building and devastated the surrounding community. A decision to rebuild at the same location symbolized a rededication to the community. An expanded congregational ministry emerged as a result of changing needs in the community.

Having celebrated its 50th anniversary, the congregation has interest in growth and in providing opportunities for worship, nurture, fellowship and service to people of all ages.