Massachusetts Route 181 leaves US 202 in the center of town, leading south 10 miles (16 km) to Palmer.

Massachusetts Route 21 leaves US 202 at the western edge of the CDP, leading southwest 10 miles to Ludlow.

Springfield, the largest city in the region, is 18 miles (29 km) southwest of Belchertown.

According to the United States Census Bureau, the CDP has a total area of 5.0 square miles (13.0 km2), of which 1.4 acres (5,582 m2), or 0.04%, are water.

27.6% of all households were made up of individuals, and 11.1% had someone living alone who was 65 years of age or older.