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Members of this conservative Christian faith came to Pennsylvania in the early 18th century to escape persecution in Europe for their Anabaptist beliefs. The Pennsylvania Amish community in Lancaster County is the oldest and largest Amish community in the United States, numbering about 30,000. The population has more than doubled in size in the past 20 years. The Amish have their roots in the Mennonite community.
List of U.S. states by Amish population. A map of the United States with all 50 states and the District of Columbia. In 2010 there were 28 states of the United States that had a significant Amish population. The 2010 census of Amish population was published in 2012, compiled by Elizabeth Cooksey, professor of sociology, and Cory Anderson, a graduate student in rural sociology, both at The Ohio State University.