Tonga Postal Codes

Tonga does not use postal codes. Mail is sorted by town and district name, so there is no postcode to look up for a Tonga address. Both the GeoNames country dataset and Google's international address metadata agree on this.

What to enter when a form demands a postcode

• Leave it blank where the form permits.
• Enter 00000 if digits are forced.
• Enter NA or the city name if letters are accepted.

None of these are official codes. They satisfy form validation and have no effect on delivery.

Country reference

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.