Montagu Bay is a suburb of Hobart, Tasmania, located in the City of Clarence on the eastern shore of the Derwent River, about four kilometres from the city centre of greater Hobart. It is a small primarily residential suburb located between Rosny, Rose Bay and Lindisfarne and is centred on a small bay of the same name, formerly known as Smelting Works Bay. The bay has a boat ramp and jetty, and is frequently filled with yachts and other vessels at anchor.