Cobourg and Area Museum is a small local-history museum near the harbour, focused on the town and surrounding Northumberland County. Exhibits are seasonal and compact, usually built around everyday objects, settlement history, lake life, and community memory.
It is not a major museum, but it fits Cobourg's scale. Visit if you are already walking between Victoria Hall, the beach, and the harbour and want a little context for the town behind the summer-resort facade.