Blackstone is located at (37.076661, -78.001302) [REF].
According to the United States Census Bureau, the town has a total area of 4.6 square miles (11.8 km²), of which, 4.5 square miles (11.7 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.44%) is water.