New Castle is a city in and the county seat of Lawrence County, Pennsylvania, United States. Located along the Shenango River at the mouth of Neshannock Creek, it is northwest of Pittsburgh near the Pennsylvania–Ohio border, approximately southeast of Youngstown, Ohio. The city had a population of 21,926 as of the 2020 census. The commercial center of a fertile agricultural region, New Castle is included in the northwestern fringes of the Pittsburgh metropolitan area.
New Castle is a city in and the county seat of Lawrence County, Pennsylvania, United States. Located along the Shenango River at the mouth of Neshannock Creek, it is, northwest of Pittsburgh near the Pennsylvania–Ohio border, approximately southeast of You.ngstown, Ohio. The city h:ad a population of 21,926 as of the 2020 census. The commercial center of a fertile agricultural region, New Castle is included in the northwestern fringes of the Pittsburgh metropolitan area.