Skip to content
lookup.sg

Lifestyle

What is a Mailing Address in Singapore? Format and Postal Codes

How to write a Singapore mailing address: block, street, unit number and 6-digit postal code, with an example and tips for sending mail from overseas.

  • By the Lookup team
  • Updated
  • 2 min read

A Singapore mailing address tells the postal service exactly where to deliver. Because Singapore is a city-state with no states, provinces or counties, the address is short and the 6-digit postal code does most of the work of pinpointing the building.

What a Singapore address contains

A typical address has:

  • The recipient's name (and company, if any)
  • The block or house number and street name
  • The unit number, written as #floor-unit (for example, #01-02)
  • The building name, if there is one
  • "Singapore" followed by the 6-digit postal code

Each postal code points to a specific building or block, which is why it matters so much. The first two digits indicate the postal sector.

Example format

Here is a made-up address to show the layout:

Jane Tan
123 Example Road
#01-02
Example Building
Singapore 123456

HDB flats are written the same way, for example "Blk 123 Example Street 45 #06-78 Singapore 123456". The block number is often shown as "Blk" or "Block".

Sending mail from overseas

  • Write "Singapore" followed by the postal code on the last line. For international mail, the country name in capitals ("SINGAPORE") should be the final line, as with any international address.
  • Keep the unit number, which is essential for apartments, offices and HDB flats.
  • Always include the 6-digit postal code. Mail without it is slower to sort.
  • If you are not sure of the postal code, SingPost has a postal code finder on its website that looks it up by block and street.

Tips for businesses

  • Use the same address wording everywhere: your website, invoices, Google Business Profile and online directories. Consistency makes it easier for customers and for services that verify your location.
  • Write the address as it really is. Adding extra keywords such as "flower shop" or "downtown" to an address line does not help, and it can cause delivery problems or look like spam.
  • If you use a shared or virtual office address, make sure the unit number is complete and that the mail is actually collected there.

Common mistakes

  • Leaving out the #floor-unit number
  • Omitting the postal code or using the wrong one
  • Writing "Singapore" twice in different spellings, or adding a state or province

For a specific building, check the postal code with SingPost before printing it on stationery or labels.