Lowellville is a village in Mahoning County, Ohio, United States, in the "Steel Valley" area of the northeast part of the state, southeast of Youngstown. The village is an older, predominantly Italian-American, working-class community built along the banks of the Mahoning River, and centered around the once productive Sharon Steel works. The population was 1,281 at the 2000 census. It is part of the Youngstown-Warren-Boardman, OH-PA Metropolitan Statistical Area.
Lowellville is located at 41°2′23″N 80°32′25″W / 41.03972°N 80.54028°W / 41.03972; -80.54028 (41.039592, -80.540165), and sits on the Pennsylvania-Ohio border, just west of Mahoningtown, Hillsville, and New Castle, Pennsylvania.
According to the United States Census Bureau, the village has a total area of 1.4 square miles (3.7 km²), all of it land.