Westpac has branches and representative offices in Asia, New Zealand, Europe, North America and the Pacific region comprising Fiji, Papua New Guinea and Vanuatu. In 2015, Westpac sold its banking operations in Samoa, Cook Islands and Tonga to the Bank of South Pacific (BSP).
| China | Beijing Office Room 9-11, 14/F West Tower, World Financial Centre No. 1 East 3rd, Ring Middle Road, Chaoyang District Beijing 100020 Phone: +86 10 8587 7367 Representative Office was opened in 1982. It is a liaison and marketing office, providing information on Westpac and limited advice, directing enquiries to Shanghai, Singapore and Australian offices for transactions. Shanghai branch 7/F Jin Mao Tower 88 Shi Ji Avenue - Pudong Shanghai 200121 - PR China Shanghai Branch was opened in 2008. Hong Kong branch Level 16 York House The Landmark 15 Queen's Road Central Phone: +852 2842 9888 Hong Kong Office was established in 1971. It offers Private Banking, Migrant Banking, Business Banking and Trade. |
| Indonesia | Jakarta Representative Office Level 29 Menara Standard Chartered JL Prof. Dr. Satrio, No. 164 Jakarta 12930, Indonesia Jakarta office was opened in 1972. |
| India | Mumbai Unit 61, Level 6 Maker Chambers VI Nariman Point, Mumbai 400021 Represented since 2007 |
| New Zealand | Westpac New Zealand head office 188 Quay Street Auckland, New Zealand Phone: +64 9 367 3727 Westpac has been operating in New Zealand since 1861 and is New Zealand's largest full service bank. With 1.3 million customers, more than one in three New Zealanders has a banking relationship with Westpac. |
| Singapore | Singapore Branch 77 Robinson Road Robinson 77, #19-00 Singapore 068896 Phone: +65 6530 9536 Singapore Branch is regional head office, established in 1979. |
| United Kingdom | Westpac London Office Ground Floor 23 Camomile Street London EC3A 7LL Phone: +44 (0) 20 7621 7222 Westpac Institutional Bank London Camomile Court 23 Camomile Street London EC3A 7LL, UK BSB: 037-902 Representative office in London was opened in February 1853, and is the oldest surviving foreign bank in the UK. Westpac Institutional Bank is represented across Europe and the Americas by over 60 people in London and over 30 people in New York. |
| USA | New York branch 575 Fifth Avenue, 39th Floor New York, NY 10017-2422, USA Phone: +1 212 551 1800 Represented since 1970 Westpac operates in the United States as a federally chartered branch, regulated by the Office of the Comptroller of the Currency. |