Lampeter is 5 miles (8 km) southeast of the center of Lancaster, the county seat.

Pennsylvania Route 741 passes through the center of the community, leading east 3 miles (5 km) to Strasburg.

U.S. Route 222 forms the western edge of Lampeter, separating it from Willow Street; US 222 leads north into the center of Lancaster and southeast 9 miles (14 km) to Quarryville.

According to the U.S. Census Bureau, the Lampeter CDP has a total area of 1.7 square miles (4.4 km2), of which 0.9 acres (3,600 m2), or 0.08%, are water.

Candlestick is a middle class neighborhood in Lampeter off Village Road.