Rosny, Tasmania

Infobox Australian Place
name = Rosny


caption =
loc-x =
loc-y =
coordinates = coord|42|52|24|S|147|21|17|E|display=inline,title
state = tas
type = suburb
lga = City of Clarence
city = Hobart
postcode = 7018
near-nw = (Tasman Bridge)
near-n = Montagu Bay
near-ne = Rosny Park
near-w = "Derwent River"
near-e = Rosny Park
near-sw = "Derwent River"
near-s = "Derwent River"
near-se = "Derwent River"

Rosny is a suburb of the City of Clarence, part of the greater Hobart area, Tasmania, Australia. It is located on the eastern shore of the Derwent River, between the suburbs of Montagu Bay and Rosny Park, approximately 4 kilometres from Hobart's centre. Rosny is the residential part of its commercial namesake Rosny Park.

Rosny was named for a family name of W.A. Bethune , the holder of the original grant on the point, and he named it after his ancestor, the Duc de Maximilien de Bethune Sully, of Rosny-sur-Seine near Mantes in France.

Rosny is a pretty, quiet, residential area, with sweeping views of the Derwent River and its estuary, the Tasman Bridge and Mount Wellington, and looks directly across the river to the CBD of Hobart. It features no commercial facilities except for a local store, and is located on a narrow peninsula which juts out from the eastern short to culminate at Rosny Point. From the shore it climbs the rising slopes of Rosny Hill.

Much of Rosny is given over to thick groves of local she-oaks, which line the foreshore, interspersed with radiating residential streets. A twisting and undulating bike path also follows the shoreline all the way from neighbouring Montagu Bay into neighbouring Rosny Park before heading in the direction of Bellerive.

Rosny Hill itself is also covered in native she-oaks and, although not particularly high, its position jutting out into the river produces spectacular views. Its peak is in fact a lookout. The entire top third of the hill is given over to Rosny Hill Nature Recreation Area, protected by Tasmanian National Parks and Wildlife, and is protected from development, adding to Rosny's scenic beauty. The hill top is prone to bushfire in Australia's hot summers.

Rosny's main non-residential or environmental feature is the sewage treatment plant located off Bastick Street, which once notoriously created foul odours, but modernised techniques have removed this.

Rosny is well serviced by local Metro Tasmania bus routes 240, 241, 242, 243, 243C, 244, and 245 all passing through the suburb. Most of these travel from Hobart Bus Station to Rosny Park Transit Mall, although sometimes bus services continue to nearby suburbs of Mornington, Warrane and Camelot Park.