Bly or BLY may refer to:
Places Bly, Missouri, a ghost town Bly, Oregon, a small town in Oregon Bly, the fictional setting of The Turn of the Screw
Transport Belmullet Aerodrome in Ireland (IATA code BLY) Bletchley railway station in England (UK National Rail station code BLY) Burnley railway station in Victoria (Australian railway station code BLY)
People Bly (surname)
See also Bligh (disambiguation)