Verplanck is located at 41°15′11″N 73°57′35″W / 41.25306°N 73.95972°W / 41.25306; -73.95972(41.252930, -73.959664).
According to the United States Census Bureau, the hamlet has a total area of 0.8 square miles (2.1 km), of which 0.7 square miles (1.8 km) is land and 0.1 square miles (0.26 km), or 11.54%, is water.
