How To Write An Address With Apartment Number: The Right Way

Nick Leason

-Sep 30, 2025

How To Write An Address With Apartment Number: The Right Way

An address that includes an apartment number requires specific formatting to ensure accurate and timely mail delivery. Here's a comprehensive guide.

Key Takeaways

Always include the apartment number on the same line as the street address or on the line immediately above it.
Use "Apt," "Apartment," or the number symbol (#) to denote the apartment number.
Ensure the address is complete with street address, apartment number, city, state, and ZIP code.
Verify the address with the recipient or use online tools to confirm accuracy.
Proper formatting prevents delays or misdelivery of mail and packages.

Introduction

Writing an address correctly, especially when it includes an apartment number, is crucial for ensuring that your mail and packages reach their intended destination without any hiccups. This guide provides a clear and concise explanation of how to properly format an address with an apartment number, covering all the necessary components and offering helpful tips to avoid common mistakes. Whether you're sending a letter to a friend or shipping a package, mastering the correct address format will save you time and potential delivery issues. — North Cape May, NJ: Your Ultimate Guide

What & Why

The Importance of Correct Addressing

Accurate addressing is vital because it directly impacts the efficiency of mail delivery services. When an address is incomplete or improperly formatted, it can lead to delays, misdelivery, or even the return of the item to the sender. This is particularly true for addresses with apartment numbers, where the specific unit must be clearly indicated to ensure it reaches the correct recipient within a multi-unit dwelling.

Components of a Complete Address

A complete address typically includes the following elements:

Recipient's Name: The name of the person or business receiving the mail.
Street Address: The numerical address and street name (e.g., 123 Main Street).
Apartment Number: The specific unit number within the building (e.g., Apt 2B).
City: The city where the recipient is located (e.g., Anytown).
State: The abbreviated state code (e.g., CA).
ZIP Code: The five-digit or nine-digit postal code (e.g., 91234-5678).

Why Apartment Numbers Matter

Apartment numbers are essential in multi-unit buildings because they differentiate between individual residences or offices within the same structure. Without the apartment number, the mail carrier would not know which specific unit the mail should be delivered to, leading to potential delivery errors.

How to Write the Address

Step-by-Step Guide

Recipient's Name: Begin with the full name of the person or business you are sending the mail to. Place this on the first line.
```
John Doe
```
Street Address and Apartment Number: On the second line, include the street address followed by the apartment number. There are a few accepted formats for indicating the apartment number:
- Using "Apt":
```
123 Main Street Apt 2B
```
- Using "Apartment":
```
123 Main Street Apartment 2B
```
- Using the number symbol (#):
```
123 Main Street #2B
```
Some sources recommend placing the apartment number on the line above the street address if space is limited:
```
Apt 2B
123 Main Street
```
City, State, and ZIP Code: On the third line, write the city, followed by a comma and a space, then the state abbreviation, followed by a space, and finally the ZIP code.
```
Anytown, CA 91234
```

Example of a Correctly Formatted Address

Here’s an example of a complete and correctly formatted address:

John Doe
123 Main Street Apt 2B
Anytown, CA 91234

Examples & Use Cases

Example 1: Standard Apartment Address

Jane Smith
456 Oak Avenue Apt 3A
Springfield, IL 62704

In this example, “Apt 3A” clearly indicates the apartment number within the building located at 456 Oak Avenue.

Example 2: Using the Number Symbol

Robert Jones
789 Pine Street #4C
Hilldale, NJ 07642

Here, the number symbol (#) is used as an alternative to “Apt” to denote the apartment number.

Example 3: Apartment Number on a Separate Line

Alice Brown
Apartment 12
101 Elm Street
Smallville, NY 10987

In this case, the apartment number is placed on a separate line above the street address, which is acceptable when space is limited.

Use Case: Sending a Package

When shipping a package, it's crucial to include the apartment number to ensure the delivery person can locate the correct unit. Online retailers often have specific fields for apartment numbers during the checkout process. Always double-check this information before finalizing your order.

Use Case: Sending a Letter

For letters, the same formatting rules apply. Whether it's a personal letter or a business correspondence, including the apartment number ensures it reaches the intended recipient promptly.

Best Practices & Common Mistakes

Best Practices

Verify the Address: Always double-check the address with the recipient, especially if you are unsure of the correct format or apartment number. Online search tools or the USPS website can also help verify addresses.
Use Standard Abbreviations: Use standard state abbreviations (e.g., CA for California, NY for New York) to avoid confusion.
Write Clearly: Ensure your handwriting is legible, or better yet, print the address using a computer.
Include Return Address: Always include your return address on the upper left corner of the envelope or package. This allows the postal service to return the item to you if it cannot be delivered.

Common Mistakes

Omitting the Apartment Number: This is the most common mistake. Always include the apartment number to ensure proper delivery.
Incorrect Apartment Number Format: Using the wrong abbreviation or symbol for the apartment number can cause confusion. Stick to “Apt,” “Apartment,” or “#.”
Incorrect ZIP Code: An incorrect ZIP code can lead to delays or misdelivery. Verify the ZIP code using the USPS website.
Illegible Handwriting: Unclear handwriting can make it difficult for the postal service to read the address, leading to errors.
Using Informal Abbreviations: Avoid using informal abbreviations or nicknames for streets or cities.

FAQs

1. Where does the apartment number go in an address?

The apartment number typically goes on the same line as the street address, following the street name. Alternatively, it can be placed on the line immediately above the street address. — MLB Playoff Schedule: Dates, Times, And How To Watch

2. What are the acceptable abbreviations for "apartment?"

The acceptable abbreviations for "apartment" are "Apt" and "Apartment." You can also use the number symbol (#).

3. Is it necessary to include the apartment number?

Yes, it is crucial to include the apartment number to ensure that your mail and packages are delivered to the correct unit within a multi-unit building. — 122 Lbs To Kg: Convert Pounds To Kilograms Easily

4. What should I do if I don't know the apartment number?

Always verify the address with the recipient to ensure you have the correct apartment number. Without it, your mail may not reach its intended destination.

5. Can I use a P.O. Box instead of a street address?

Yes, you can use a P.O. Box as an alternative to a street address. When using a P.O. Box, include the box number in place of the street address and apartment number.

Conclusion

Writing an address with an apartment number correctly is essential for ensuring accurate and timely mail delivery. By following the guidelines outlined in this guide, you can avoid common mistakes and ensure your mail reaches its intended destination without any issues. Always verify the address, use standard abbreviations, and write clearly to facilitate the delivery process.

Ready to send that letter or package? Double-check your address formatting now to avoid delays!

Last updated: June 12, 2024, 14:48 UTC