Lancaster County, sometimes nicknamed the Garden Spot of America or Pennsylvania Dutch Country, is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 552,984, making it Pennsylvania's sixth-most populous county. Its county seat is also Lancaster. Lancaster County comprises the Lancaster metropolitan statistical area. The county is part of the South Central region of the state.

Pennsylvania Dutch, sometimes referred to as Pennsylvania German, is a variation of Palatine German spoken by the Pennsylvania Dutch, including the Amish, Mennonites, Fancy Dutch, and other related groups in the United States and Canada. There are approximately 300,000 native speakers of Pennsylvania Dutch in the United States and Canada.