Lackawanna County is a county in the Commonwealth of Pennsylvania. It is located in Northeastern Pennsylvania and had a population of 215,615 (2022). Its county seat and most populous city is Scranton. The county is part of the Northeast Pennsylvania region of the state.

Northeastern Pennsylvania is a region of the U.S. state of Pennsylvania that includes the Pocono Mountains, the Endless Mountains, and the industrial cities of Scranton, 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.