Pennsylvania Dutch Country, also called the Deitscherei in Deitsch, refers to an area of southeastern Pennsylvania, United States that by the American Revolution had a high percentage of Pennsylvania Dutch inhabitants. Religiously, there was a large portion of Lutherans. There were also German Reformed, Moravian, Amish, Mennonite, Schwarzenau Brethren and other German Christian sects. The term was used in the middle of the 20th century as a description of a region with a distinctive Pennsylvania Dutch culture, but in recent decades the composition of the population is changing and the phrase is used more now in a tourism context than any other.
Greater Pennsylvania refers to this region as well as historically Pennsylvania Dutch-speaking areas of Maryland, North Carolina, and Virginia.
Geographically the area referred to as Amish/Dutch country centers on the cities of Allentown, Hershey, Lancaster, Reading, and York. Pennsylvania Dutch Country encompasses the counties of Chester, Lancaster, York, Adams, Franklin, Dauphin, Lebanon, Berks, Montgomery, Bucks, Northampton, Lehigh, Schuylkill, Snyder, Union, Juniata, Mifflin, Huntingdon, Northumberland, and Centre. Pennsylvania Dutch immigrants would spread from this area outwards outside the Pennsylvania borders between the mountains along river valleys into neighboring Maryland (Washington and Frederick counties), West Virginia, New Jersey (Warren and northern Hunterdon counties), Virginia (Shenandoah Valley), and North Carolina. The larger region has been historically referred to as Greater Pennsylvania. The historic Pennsylvania Dutch diaspora in Ontario, Canada has been referred to as Little Pennsylvania.