Lancaster County (/ˈlæŋkɪstər/; Pennsylvania Dutch: Lengeschder Kaundi), sometimes nicknamed the Garden Spot of America or Pennsylvania Dutch Country, is a county in the Commonwealth of Pennsylvania. It is located in the south central part of Pennsylvania. As of the 2020 census, the population was 552,984, making it Pennsylvania's sixth-most populous county. Its county seat is Lancaster. Lancaster County comprises the Lancaster, Pennsylvania metropolitan statistical area.