The Church of Saint Mary's is a 1909 Beaux-Arts Catholic church, located at 8433 239th Street East, New Trier in the U.S. state of Minnesota. The bright red building sits high on a hill overlooking the town, which was settled by German immigrants from Trier. The immigrants began arriving in 1854, and in 1857, they built a log church. In 1864, they built a larger stone church on a hill above the town.
In 1909 the congregation decided to build a new, larger church. George J. Ries of St. Paul, who also designed the Church of St. Agnes, used a Beaux-Arts style for the new church. It is built of red brick and can be seen from miles, being perched on a hilltop. The cornerstone from the old church is installed in the vestibule, and a five-foot tall statue of the Blessed Virgin Mary from 1862 is located in a shrine above the main entrance.