Predominant church groups in Iowa include Catholic, Methodist, Lutheran, and Baptist. Less in size, but equally important in religious history in the state are the Quakers, Mormons, Mennonites, and Congregationalists. The first church building in Iowa, a Methodist Church built of logs, was constructed in Dubuque in 1834. A year later the Catholics erected a parish building in the same city. In 1843 the “Iowa Band” of Congregational and Presbyterian clergy began ministering to the settlers in Iowa. In 1854 a small group of the Community of True Inspiration arrived from Germany, settling along the Iowa River in the mid-section of the state. A year later additional members of their group joined them, establishing the unique Amana colonies of present-day Iowa.

As published online by the Iowa Genealogical Society