Montrose Basin is a nearly circular tidal basin which makes up part of the estuary of the River South Esk and which sits just inland of the town of Montrose in Angus on the east coast of Scotland. The basin is protected by a number of designations, it is managed by the Scottish Wildlife Trust as a Wildlife Reserve, as well as being designated as a Local Nature Reserve, Site of Special Scientific Interest, a Special Protection Area and a Ramsar Site.