Regions of Pennsylvania in the context of Columbia County, Pennsylvania

Centre County is a county in the Commonwealth of Pennsylvania, United States. As of the 2020 census, the population was 158,172. Its county seat is Bellefonte. Centre County is composed of the State College, PA Metropolitan Statistical Area. The county is part of the Central region of the commonwealth.

Northeastern Pennsylvania (NEPA or Nepa; sometimes pronounced /ˈniːpɑː/ NEE-pah) is a region of the U.S. state of Pennsylvania that includes the Pocono Mountains, and the industrial cities of Scranton (the area's largest city), Wilkes-Barre, Pittston, Hazleton, Nanticoke, and Carbondale. A portion of this region is located in the New York City metropolitan area. Recently, Pennsylvania tourism boards have described Northeastern Pennsylvania as Upstate Pennsylvania.

Unlike most other parts of the Rust Belt, some of the communities are experiencing a modest population increase, and others, including Monroe and Pike counties, rank among the state's fastest growing counties.

Northumberland County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 91,647. Its county seat is Sunbury. The county is part of the Central region of the commonwealth.

The county was formed in 1772 from parts of Lancaster, Berks, Bedford, Cumberland, and Northampton Counties and named for the county of Northumberland in northern England. Northumberland County is a fifth class county according to the Pennsylvania's County Code. Northumberland County comprises the Sunbury, Pennsylvania Micropolitan Statistical Area, which is also included in the Bloomsburg-Berwick-Sunbury, PA Combined Statistical Area. Among its notable residents are Thomas L. Hamer, a Democratic member of Congress in the 1830s, and Joseph Priestley, the Enlightenment chemist and theologian, who left England in 1796 due to religious and political persecution and settled on the Susquehanna River. His former house, originally purchased by chemists from Pennsylvania State University after a colloquium that founded the American Chemical Society, is a historical museum.