Erie is a city in and the county seat of Erie County, Pennsylvania, United States. Named for the lake and the Native American tribe that resided along its southern shore, Erie is the fourth-largest city in Pennsylvania, as well as the largest city in Northwestern Pennsylvania, with a population of 101,786 at the 2010 census. The estimated population in 2016 had decreased to 98,593. The Erie metropolitan area, equivalent to all of Erie County, consists of 276,207 residents. The Erie-Meadville, PA Combined Statistical Area has a population of 369,331, as of the 2010 Census.