Australian Address Format: States, Postcodes, and Conventions
Guide to Australian address formatting including state abbreviations, 4-digit postcodes, and address conventions used by Australia Post.
Australian Address Format
Australia uses an address format that shares similarities with both the US and UK systems, but has its own distinct conventions enforced by Australia Post. Understanding these conventions is important for developers serving Australian users.
Standard Format
[Recipient Name]
[Unit/Level (if applicable)]
[Street Number] [Street Name] [Street Type]
[Suburb/Locality] [State Abbreviation] [Postcode]
Example
Ms Sarah Johnson
Unit 5
42 George Street
Sydney NSW 2000
Key Components
Street Address
Australian street addresses follow a similar pattern to US addresses with the number before the street name:
42 George Street (not "George Street 42" as in Germany)
Common street types: Street (St), Road (Rd), Avenue (Ave), Drive (Dr), Crescent (Cres), Court (Ct), Place (Pl), Parade (Pde), Highway (Hwy)
Unit and Level Numbers
For apartments and offices, Australia uses specific conventions:
Unit 5, 42 George Street
Level 3, 100 Market Street
Shop 2A, 88 King Street
Australia Post recommends placing the unit information on a separate line above the street address for clarity.
Suburb or Locality
Australians refer to neighborhoods as "suburbs" even in rural areas. The suburb name serves a similar role to the city name in US addresses. For mail delivery, the suburb must match Australia Post's official locality name.
In cities like Sydney and Melbourne, the suburb is more specific than the city. For example, "Bondi Beach," "Surry Hills," and "Parramatta" are all suburbs within the greater Sydney area.
State and Territory Abbreviations
Australia has six states and two territories, each with an official abbreviation:
| Abbreviation | State/Territory |
|-------------|-----------------|
| NSW | New South Wales |
| VIC | Victoria |
| QLD | Queensland |
| SA | South Australia |
| WA | Western Australia |
| TAS | Tasmania |
| ACT | Australian Capital Territory |
| NT | Northern Territory |
Postcodes
Australian postcodes are **4 digits** and follow a geographic pattern:
0* - Northern Territory (0800-0899)
1* - NSW (mailbox deliveries, not geographic - 1000-1999)
2* - NSW and ACT (2000-2999)
3* - Victoria (3000-3999)
4* - Queensland (4000-4999)
5* - South Australia (5000-5999)
6* - Western Australia (6000-6999)
7* - Tasmania (7000-7999)
Note that postcodes starting with 0 are valid (Northern Territory), so always store as strings.
Validation Regex
^[0-9]{4}$
Formatting Rules from Australia Post
Australia Post recommends these conventions for clear, machine-readable addresses:
**Last line in capitals** - The suburb, state, and postcode line should be in uppercase: **SYDNEY NSW 2000**
**No punctuation** - Avoid commas and full stops in the address
**State on the same line as suburb and postcode** - Unlike UK postcodes on their own line
**Left-aligned text** - All lines should be left-aligned