Seaforth Sydney, New South Wales
View of Middle Harbour from Seaforth
Population	7,384 (SAL 2021)[1]
Established	1906
Postcode(s)	2092
Elevation	70 m (230 ft)
Area	3.1 km2 (1.2 sq mi)
Location	12 km (7 mi) north-east of Sydney CBD
LGA(s)	Northern Beaches Council
State electorate(s)	Manly
Federal division(s)	Warringah
Suburbs around Seaforth: Killarney Heights Allambie Heights North Balgowlah Castlecrag Castle Cove Seaforth Balgowlah Northbridge Mosman Clontarf

Seaforth is a suburb of Northern Sydney, in the state of New South Wales, Australia. Seaforth is located 12 kilometres north-east of the Sydney central business district in the local government area of Northern Beaches Council and is part of the Northern Beaches region.

Seaforth overlooks Middle Harbour and is linked south to Mosman by the Spit Bridge. To the west, Seaforth overlooks Sugarloaf Bay across to the suburbs of Northbridge, Castlecrag and Castle Cove. The Garigal National Park sits on the northern border.^[2]

Seaforth was named after Loch Seaforth and Seaforth Island in Scotland. The land in this area was once owned by Henry Halloran, who subdivided it in 1906.^[3]

The Seaforth library was built in 1887 and protected by heritage listing by Manly Council in 1995. It stands outside the former Seaforth TAFE. Seaforth celebrated its centenary on Sunday 12 November 2006 with a historical display in the town centre.

The Seaforth shopping district is located off Sydney Road and offers a wide variety of services, including niche market products. It is also home to Balgowlah RSL Memorial Club.

At the 2021 census, the suburb of Seaforth recorded a population of 7,384. Of these:

• There are more families with young children than typical. While the median age was 42 years, compared to the national median of 38 years, children aged under 15 years made up 23.1% of the population (the national average was 18.2%) and people aged 65 years and over made up 15.3% of the population (the national average was 17.2%).
• 64.9% of people were born in Australia. The most common countries of birth were England 9.5%, China (excluding Special Administrative Regions and Taiwan) 2.5%, New Zealand 2.2%, South Africa 1.7% and the United States of America 1.5%.
• 81.9% of people only spoke English at home. Other languages spoken at home included Mandarin at 2.9%, Cantonese at 1.2%, Spanish at 1.2%, Greek at 1.1% and German at 1.0%.
• The most common responses for religion were No Religion at 41.7%, Catholic at 24.8%, Anglican at 16.3% and Eastern Orthodox at 2.7%.
• The median household weekly income was $4,184, compared to the national median of $1,746.
• Separate houses made up the vast majority (86.6%) of residences, 8.0% were semi-detached and 5.1% were flats, units or apartments. The average household size was 3.1 people.^[4]

Seaforth is home to Seaforth Public School. There is currently an aged care facility where a TAFE used to be.

Wikimedia Commons has media related to Seaforth, New South Wales.

• John MacRitchie – Manly Library (2008). "Seaforth". Dictionary of Sydney. Retrieved 29 September 2015. [CC-By-SA]