Chewton is 9 miles (14 km) south of New Castle, the county seat. Pennsylvania Route 288 passes through the southwestern side of the community, leading west across the Beaver River into Wampum and southeast 4 miles (6 km) to Ellwood City.
According to the United States Census Bureau, the CDP has a total area of 1.5 square miles (3.9 km2), of which 0.02 square miles (0.04 km2), or 1.06%, are water.[5] Via the Beaver River, Chewton is part of the Ohio River watershed.