The suburb's name is derived from its namesake Greenwich, by the banks of the River Thames in London.
Parramatta River had been known as the 'Thames of the Antipodes' and other nearby suburbs were also named after Thames localities of Putney, Woolwich and Henley.

The Cammeraygal clan of the Kuringgai people were the first inhabitants of the Greenwich area, and lived along the foreshores of the harbour, hunting in the hinterland and trading with other clans.

The first known occasion when a European went to the area was in 1788, when Lieutenant Henry Ball passed through the area while returning from a trip to the Middle Harbour area.
Land grants began in 1794 and industries developed in the area during the 1830s.

Aboriginal people were still present in the 1820s, but disease and displacement had driven them out by the 1860s.

Early land grants were made to Samuel Lightfoot, a convict, in 1794, and William Gore, public servant, in 1813.
Gore built a road from his farm at Artarmon to Gore Cove, which was the beginning of Greenwich Road.

In the 1830s George Green and his father Amaziah bought land in Greenwich, with access to the harbour, and along with others began a shipbuilding industry on the foreshore.
When Green subdivided his land in 1840, the name 'Greenwich' was mentioned for the first time.

Greenwich House—a two-storey Georgian home made from sandstone blocks—was built on the 20-acre (8.1 ha) estate of George Green in 1836 and still stands on the corner of George and St Lawrence Streets.
The house was eventually sold, by the mortgage holders, to Gother Kerr Mann in the early 1850s, and remained in that family until 1949.

The eastern tip of Greenwich is called Manns Point, after Gother Kerr Mann (1809–1899).
Mann was the first Chief Commissioner for Railways, the Superintendent of convicts at Cockatoo Island and the builder of Fitzroy Dock.

By the early 1880s Greenwich Point already had a post office, general store, and school, with around 16 houses.
Upper Greenwich took longer to develop, with most of the area still virgin bush.
But with the improvement in north shore roads, and increasing subdivision in upper Greenwich, some grander houses were built near River Road, and new estates were subdivided as Greenwich became a commuter suburb.

Between the 1880s and the 1940s a number of successful dairies operated in Greenwich, run by the Anderson, Hogan, Mather and Clarke families.
The milk from Anderson's was delivered by boat along the Lane Cove River and to the residents of Cockatoo Island.
Hogan's dairy at Chisholm Street had 300 cows by the time it closed in 1928.
Clarke's dairy was on the site of the current golf course.

Light industry was set up along the foreshores of Greenwich, including Shipbuilding, brickmaking, quarrying, and the Patent Asphaltum Company which refined bitumen and manufactured building materials.
The Shell Transport and Trading Company opened a terminal at Gore Bay in 1901, importing and distributing petroleum products.
It grew over time to include the sites of the Patent Asphaltum works, and several wharves, as well as the shale oil refining works of John Fell & Co. By the late 1930s, over 500 workers were employed at the Shell site.
Today fuel products unloaded at Gore Bay are transferred by an underground pipe to the Clyde Refinery.

Greenwich was the northern portal of the first tunnel under Sydney Harbour.
The tunnel was dug by the New South Wales Government Railways to Birchgrove to provide a reliable way to get electricity from the Pyrmont Power Station to the tram network on the north shore.
Cables had previously been laid on the floor of the harbour, but damaged by ships dragging their anchors.
The tunnel was commenced in 1913 and excavated by hand, completed in 1924.
Part of the tunnel is through the silt at the bottom of the river, so required constant pumping until it was allowed to flood in 1930 and abandoned from 1969.
The tunnel was excavated almost entirely from the Greenwich side, as the residents on Long Nose Point at Balmain (now Birchgrove) successfully objected to the noise
The suburb's name is derived from its namesake Greenwich, by the banks of the River Thames in London. Parramatta River had been known as the 'Thames of the Antipodes' and other nearby suburbs were also named after Thames localities of Putney, Woolwich and Henley.
The Cammeraygal clan of the Kuringgai people were the first inhabitants of the Greenwich area, and lived along the foreshores of the harbour, hunting in the hinterland and trading with other clans.
The first known occasion when a European went to the area was in 1788, when Lieutenant Henry Ball passed through the area while returning from a trip to the Middle Harbour area. Land grants began in 1794 and industries developed in the area during the 1830s.
Aboriginal people were still present in the 1820s, but disease and displacement had driven them out by the 1860s.
Early land grants were made to Samuel Lightfoot, a convict, in 1794, and William Gore, public servant, in 1813. Gore built a road from his farm at Artarmon to Gore Cove, which was the beginning of Greenwich Road.
In the 1830s George Green and his father Amaziah bought land in Greenwich, with access to the harbour, and along with others began a shipbuilding industry on the foreshore. When Green subdivided his land in 1840, the name 'Greenwich' was mentioned for the first time. 
Greenwich House—a two-storey Georgian home made from sandstone blocks—was built on the 20-acre (8.1 ha) estate of George Green in 1836 and still stands on the corner of George and St Lawrence Streets. The house was eventually sold, by the mortgage holders, to Gother Kerr Mann in the early 1850s, and remained in that family until 1949.
The eastern tip of Greenwich is called Manns Point, after Gother Kerr Mann (1809–1899). Mann was the first Chief Commissioner for Railways, the Superintendent of convicts at Cockatoo Island and the builder of Fitzroy Dock.
By the early 1880s Greenwich Point already had a post office, general store, and school, with around 16 houses. Upper Greenwich took longer to develop, with most of the area still virgin bush. But with the improvement in north shore roads, and increasing subdivision in upper Greenwich, some grander houses were built near River Road, and new estates were subdivided as Greenwich became a commuter suburb.
Between the 1880s and the 1940s a number of successful dairies operated in Greenwich, run by the Anderson, Hogan, Mather and Clarke families. The milk from Anderson's was delivered by boat along the Lane Cove River and to the residents of Cockatoo Island. Hogan's dairy at Chisholm Street had 300 cows by the time it closed in 1928. Clarke's dairy was on the site of the current golf course.
Light industry was set up along the foreshores of Greenwich, including Shipbuilding, brickmaking, quarrying, and the Patent Asphaltum Company which refined bitumen and manufactured building materials. The Shell Transport and Trading Company opened a terminal at Gore Bay in 1901, importing and distributing petroleum products. It grew over time to include the sites of the Patent Asphaltum works, and several wharves, as well as the shale oil refining works of John Fell & Co. By the late 1930s, over 500 workers were employed at the Shell site. Today fuel products unloaded at Gore Bay are transferred by an underground pipe to the Clyde Refinery.
Greenwich was the northern portal of the first tunnel under Sydney Harbour. The tunnel was dug by the New South Wales Government Railways to Birchgrove to provide a reliable way to get electricity from the Pyrmont Power Station to the tram network on the north shore. Cables had previously been laid on the floor of the harbour, but damaged by ships dragging their anchors. The tunnel was commenced in 1913 and excavated by hand, completed in 1924. Part of the tunnel is through the silt at the bottom of the river, so required constant pumping until it was allowed to flood in 1930 and abandoned from 1969. The tunnel was excavated almost entirely from the Greenwich side, as the residents on Long Nose Point at Balmain (now Birchgrove) successfully objected to the noise
Greenwich, New South Wales