 In 1762 Mecklenburg County, North Carolina, was formed from western Anson and included present-day northern York County.Five years later, the area became part of Tryon County, North Carolina, which comprised all of North Carolina west of the Catawba River and south of Rowan County.This area would remain a part of Tryon County until 1772, when the boundary between North and South Carolina in this portion was finally established.