Grand Lake is a lake in Mercer County, Ohio. Its current pool elevation is about 870 ft (USGS gauge 403204084342601, 2026-06-23 17:15). We never estimate missing readings — a “—” means no current source.
Live USGS gauge 403204084342601
Full conditions, things to do, and where to stay, eat, and rent on the Grand Lake guide. More: boat rentals · cabins & rentals · fishing · things to do.