How To Write Apt Number In Address

Get step-by-step guidance on formatting apartment addresses correctly for envelopes, forms, and postal accuracy

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How to Format Your Address with Apartment Number

Simple steps to create amazing results

Write the Street Address

Begin with the recipient's name on the first line, then write the building number and street name on the second line. Use standard abbreviations like St, Ave, or Blvd for consistency.

Add the Apartment Number

Include the apartment number on the same line as the street address (preferred) or on a separate line below it. Use abbreviations like 'Apt', 'Unit', '#', or 'Ste' followed by the apartment number.

Complete with City, State, and ZIP

On the final line, write the city name, followed by the two-letter state abbreviation and ZIP code. Ensure proper spacing and use all capital letters for optimal mail processing.

Address Formatting Best Practices

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Multiple Format Options

Choose between single-line or two-line apartment number formats. Both '123 Main St Apt 4B' and having 'Apt 4B' on a separate line are acceptable and widely recognized by postal services.

Standard Abbreviations

Use recognized abbreviations like 'Apt' for apartment, 'Unit' for unit, 'Ste' for suite, or simply '#' before the number. This ensures clarity and prevents confusion during mail delivery.

Online Form Compatibility

Learn how to split your address correctly for online forms that have separate fields for street address and apartment number, ensuring your information processes correctly.

International Standards

Understand how apartment numbering varies by country and region, with guidelines for both domestic and international mail to ensure your packages arrive safely.

Frequently Asked Questions

Everything you need to know

How do I write an address with an apartment number?

To write an address with an apartment number, start with the street address, followed by the apartment number on the same line or on a new line, then the city, state, and ZIP code.

Where do I put the apartment number in an address?

The apartment number can go on the same line as the street address or on a new line directly below it. Ensure it is clearly marked with 'Apt', 'Unit', or similar.

Does the apartment number go on the second line of the address?

Yes, the apartment number can be placed on the second line of the address for clarity. For example: 123 Main St Apt 4B New York, NY 10001

Should I use 'Apt' or '#' before the apartment number?

Both 'Apt' and '#' are acceptable. The USPS recognizes multiple abbreviations including 'Apt', 'Unit', 'Ste', and '#'. Choose whichever is clearest and most consistent with your needs.

What if my apartment number includes letters?

Include both numbers and letters exactly as designated (e.g., 'Apt 4B', 'Unit 12A'). Do not add spaces between the number and letter unless that's how your building officially designates it.

Can I put the apartment number before the street address?

No, always place the apartment number after the street address. The street address should come first, followed by the apartment identifier. This format is standard for postal processing and delivery.

Ready to Format Your Address Correctly?

Master apartment address formatting and ensure your mail always reaches its destination without delays or returns.