There are 22 US Post Offices in Lackawanna County serving a total of 167,518 residents equating to 7,614 residents per post office. It's estimated that approximately 267,377 packages are handled across the 22 county post offices annually. Lackawanna County is a county in the U.S. state of Pennsylvania. As of the 2010 census, the population was 214,437. Its county seat and largest city is Scranton. The county was created on August 13, 1878, following decades of trying to gain its independence from Luzerne County. (The courts were organized in October 1878.) It is Pennsylvania's last county to be created. It is named for the Lackawanna River. Lackawanna County is included in the Scranton\u2014Wilkes-Barre\u2014Hazleton, PA Metropolitan Statistical Area (\"Wyoming Valley\"). It lies northwest of the Pocono Mountains. Lackawanna County is located approximately 40 miles from the New Jersey border in Montague, New Jersey and also located approximately 33 miles from upstate New York in Windsor, New York."