How to address an envelope correctly

Labeling an envelope properly helps your mail arrive on time and without delays. Once you know the layout, it only takes a minute to address an envelope, whether you're sending a holiday card, an invitation, or a business letter.

Quick envelope checklist

Before you drop your letter in the mailbox, make sure you've covered the basics.

□ Return address in the top left corner

□ Recipient's address centered on the envelope

□ Full street address, city, state, and ZIP Code

□ Apartment or suite number included, if applicable

□ Correct postage attached

□ Address written clearly or printed

How to address an envelope

Most envelopes follow the same basic layout. Place the sender's address, also known as the return address, in the top left corner, the recipient's address in the center, and the postage stamp in the top right corner. Before sending your letter, check that the address is complete, easy to read, and includes the correct ZIP Code.

1. Write the return address

Include your full name, street address, city, state, and ZIP Code in the top left corner of the envelope. Although a return address isn't required, it's recommended because the postal service can use it to return your letter if delivery isn't possible.

2. Add the recipient's address

Include the recipient's full name in the center of the envelope, followed by the street address, apartment or suite number (if applicable), and the city, state, and ZIP Code on the last line.

3. Attach the postage stamp

Place the correct postage stamp in the top right corner of the envelope. Using the right postage helps your letter move through the USPS system without unnecessary delays.

Envelope address examples for common mailing situations

Most envelopes use the same format, but a few address types include additional information. Use the examples below whenever you need to address an envelope for personal or business mail.

Standard home address

Jane Smith

123 Maple Street

Chicago, IL 60601

Use this format for most residential addresses.

Apartment or suite number

Jane Smith

123 Maple Street, Apt 4B

Chicago, IL 60601

Include the apartment, unit, or suite number whenever it's part of the mailing address. Without it, your letter may not reach the intended recipient.

Business address

Jane Smith

ABC Company

456 Market Street

Seattle, WA 98101

Include the business name above the street address when mailing to a company or workplace.

PO Box

Jane Smith

PO Box 123

Denver, CO 80202

If the recipient receives mail through a PO Box, use the PO Box instead of a street address.

International mail

Jane Smith

15 Oxford Street

London W1D 2HG

UNITED KINGDOM

International addresses don't always follow the same format as US addresses. Write the destination country in capital letters on the last line and check the destination country's postal requirements before mailing internationally.

USPS envelope addressing tips

Once you've placed everything in the right location, these formatting tips can help your mail move through the postal system more efficiently.

Write clearly

Use a black or blue pen, or print the address on a mailing label. Clear handwriting is easier to read and less likely to cause delivery problems.

Follow USPS formatting

Keep each part of the address on its own line and align it parallel to the longest side of the envelope. Include the full ZIP Code, or ZIP+4 if available, to help USPS process your mail more efficiently.

Use standard abbreviations

Write the city name in full and use the official two-letter abbreviation for the state. Avoid unnecessary punctuation unless it's part of a ZIP+4 code. While all capital letters can improve machine readability, neatly printed mixed-case addresses are also widely accepted.

Check your postage

Most standard letters weighing up to 1 ounce require one First-Class Mail stamp. Large envelopes and heavier mail need additional postage, so check the current USPS rates or ask your local post office if you're unsure. Priority Mail envelopes follow the same addressing format as standard letters.

Common mistakes when addressing an envelope

A few simple checks can help you avoid delays and returned mail.

Missing or incorrect ZIP Code

An incorrect ZIP Code can slow down delivery or send your letter to the wrong destination. Double-check the city, state, and ZIP Code before mailing.

Leaving out an apartment or suite number

If the recipient's address includes an apartment, unit, or suite number, be sure to include it. Missing this information can make the address incomplete.

Poor handwriting

Smudged ink, cursive writing, or decorative fonts can make an address difficult to read. If possible, use clear block letters or a printed mailing label.

Incorrect or missing postage

Letters that are heavier, unusually shaped, or sent in large envelopes may need additional postage. If you're unsure, your local post office can help you choose the correct amount before you send mail.

Final thoughts

Addressing an envelope by hand is easy enough, but small mistakes like a smudged ZIP Code or a misplaced return address can slow your mail down. If you send letters often, address labels make the job faster and cut down on errors.

Sticker it's labels give you a clean, correctly formatted address every time. Set it up once, then print as many as you need.

FAQs

Do I need to include a return address?

No. A return address isn't required for most mail, but USPS recommends including the sender's address so your letter can be returned if it can't be delivered.

Can I handwrite an envelope?

Yes. Handwritten addresses are perfectly acceptable as long as they're neat and easy to read. Use a black or blue pen rather than a pencil.

How many stamps do I need?

Most standard letters require one First-Class Mail stamp. Large envelopes, heavier mail, and international mail usually require additional postage.

Where does the apartment or suite number go?

Include the apartment, unit, or suite number as part of the street address. Depending on the format, it can appear on the same line as the street address or on the line below.

How do I label an international envelope?

Use the destination country's preferred address format whenever possible. Include the country name in capital letters on the last line and use the correct international postage, such as a Global Forever Stamp for eligible letters.

How do I address military mail?

Military addresses use APO, FPO, or DPO instead of the city name and include a military state code such as AA, AE, or AP. Follow USPS military addressing guidelines to ensure your mail reaches the correct destination.

Should I use capital letters?

They're not required, but USPS notes that capital letters can improve machine readability. Neatly written mixed-case addresses are also acceptable if they're clear and easy to read.

Can I use address labels instead of handwriting?

Yes, printed address labels are widely accepted and can improve readability, especially for business mail or when sending multiple letters.