The Trinity Lutheran Church in the Iowa County town of Millersburg was constructed in March 1937, with the help of volunteer labor and one paid carpenter. A new floor and kitchen cabinets were installed in the basement in 1958; at the same time, a multipurpose room was created on the main level. Since 1963, Trinity has shared a pastor with Calvary Lutheran Church in nearby Deep River. The most recent change to the church was the addition of stained glass windows in 1993.