Potosi is located along FM 1750, approximately nine miles south of Abilene in east-central Taylor County.[4] According to the United States Census Bureau, the CDP has a total area of 18.5 sq mi (47.8 km2), all land.Potosi also borders the neighboring semiarid climate (Köppen BSh or BSk) of the west-central Texas region, which has characteristically long, hot summers and short, moderate winters.In 1893, R.A. Pollard applied for a post office and chose the name Potosi after the Mexican city of San Luis Potosí.Significant growth in the area, aided by its proximity to Abilene, began to occur in the late 1980s, and by 1992, 1,441 people were living in Potosi.