Heard and McDonald Islands Postal Codes
Heard and McDonald Islands uses postal codes in the format #### (# = digit, @ = letter).
1 postal codes are recorded for Heard and McDonald Islands in the open data sources below.
Example postal codes
7050
Postal codes by place
Places in Heard and McDonald Islands with a recorded postal code.
| Place | Postal code |
|---|---|
| Territory of Heard Island and McDonald Islands | 7151 |
How an address is written in Heard and McDonald Islands
This is the order Heard and McDonald Islands's postal service expects. Square brackets mark what you replace.
[Recipient name]
[Street address]
[City] [State] [Postal code (7050)]
HEARD AND MCDONALD ISLANDS
A postal code is optional in Heard and McDonald Islands addresses — mail is deliverable without one, though including it speeds up sorting.
Country reference
| ISO 3166-1 alpha-2 | HM |
|---|---|
| ISO 3166-1 alpha-3 | HMD |
| Telephone code | + |
| Currency | Dollar (AUD) |
| Internet TLD | .hm |
Sources and licensing
Postal code data from GeoNames, used under the Creative Commons Attribution 4.0 International licence. Address formats and validation rules derive from Google's international address metadata, cross-checked against Universal Postal Union addressing standards. Last verified August 2026. Confirm time-critical addresses with the destination country's postal operator.
Postal codes by town and city
1 places in Heard and McDonald Islands have a recorded postal code. The 0 largest have their own page; the rest are listed alphabetically.