| Purchase Bay | |
| Location: | Melville Island |
| Coords: | 75.5839°N -116.0028°W |
| Oceans: | Arctic Ocean |
| Countries: | Canada |
| Pushpin Map: | Canada Northwest Territories |
| Cities: | Uninhabited |
Purchase Bay is a fjord in the Arctic Archipelago, on the western side of Melville Island, Northwest Territories, Canada. It is approximately long. It was named for the engineer of, Thomas Purchase, during the Belcher expedition[1]