Webthe lancaster amish affiliation is the largest affiliation among the old order amish and as such a subgroup of amish. Its origin and largest settlement is lancaster county,. Webthe first sizable group of amish arrived in lancaster county in the 1720s or 1730s. Today, the amish can be found in 23 states here and in one canadian province. Webthe rolling hills and lush farmlands of lancaster county provide a serene backdrop for exploring the rich tapestry of amish culture and heritage. One of the most captivating.