St. Mary Help of Christians Church is a historic Roman Catholic church building in St. Augusta, Minnesota, United States. It is part of the Roman Catholic Diocese of Saint Cloud. The church was constructed in 1873 in a rural community settled by German immigrants. An 1890 rectory stands southeast of the church. Both buildings were listed on the National Register of Historic Places in 1982 for their state-level significance in the themes of architecture, exploration/settlement, and religion. The property was nominated for reflecting the settlement of rural Stearns County by Catholic immigrant groups clustered in small, ethnic hamlets dominated by a central church.