Lower Plenty is a suburb of Melbourne, Victoria, Australia, 16 km north-east from Melbourne's Central Business District. Its local government area is the City of Banyule. At the 2011 Census, Lower Plenty had a population of 3,782.Lower Plenty, in earlier times part of Eltham, almost certainly got its name from the Lower Plenty Toll Bridge, built in 1860 to collect tolls across the Plenty River. This bluestone bridge still stands as part of the Lower Plenty Trail.