Change your USPS.com username from your account settings

To change your username on USPS.com, log in to your account, go to Settings, select "Username and Password," and enter your new username. USPS will ask you to confirm your current password before saving the change. The new username takes effect when ready, though you may need to log out and back in to see it reflected everywhere on the site.

Your username is different from your email address. You can change one without changing the other. If you forget which username you set up, USPS will let you sign in using your email address instead — so you do not need to recover it before making a change.

The username you choose must be between 6 and 20 characters, can include letters and numbers, and cannot contain spaces or special characters. USPS will tell you when ready if the name you want is already taken or does not meet the rules.

Key Takeaways

  • Log in to USPS.com, open Settings, and select "Username and Password" to reach the change screen.
  • Your new username takes effect right away, but you may need to log out and log back in to see it everywhere on the site.
  • Usernames must be 6 to 20 characters long and can only contain letters and numbers — no spaces or special characters.
  • If you forget your username, you can sign in with your email address instead, so you do not need to recover it before changing it.

Where to find the username change option

Open USPS.com and sign in with your current username or email address. Once you are logged in, look for your account menu — this is usually in the top right corner of the page, often marked with your name or a profile icon.

Click on that menu and select "Settings" or "Account Settings." The exact wording depends on which USPS portal you are using, but the option is always near the top of the menu. Once in Settings, look for a section called "Username and Password" or "Login Credentials." Click on it to open the change screen.

What happens when you enter a new username

When you type in your new username, USPS checks it against three rules: it must be 6 to 20 characters long, it can only contain letters (A–Z, a–z) and numbers (0–9), and it cannot already be in use by another account. If your choice breaks any of these rules, the site will show an error message right away and will not let you save.

If your username is available and meets the rules, USPS will ask you to enter your current password to confirm the change. This is a security step — it makes sure that someone who has access to your computer cannot change your username without knowing your password. Type your password and click "Save" or "Confirm."

When the change takes effect

Your new username is active as soon as you save it. You can sign out and sign back in using the new username right away. However, some parts of the USPS website or mobile app may still show your old username for a few minutes or until you refresh the page. This is normal and does not mean the change failed.

If you stay logged in after changing your username, you may see the old username in some places on the page until you log out and log back in. Refreshing the page (pressing F5 or Ctrl+R on Windows, or Command+R on Mac) often clears this up without needing to log out.

If you cannot remember your current username

You do not need to remember your username to change it. When you sign in to USPS.com, you can use either your username or your email address — the site accepts both. If you use your email address to log in, you can still reach Settings and change your username the same way.

This means you can change a forgotten username without having to recover it first. Just sign in with your email, go to Settings, and pick a new username you will remember.

Usernames versus email addresses on USPS.com

Your USPS.com username and your email address are separate things. You can change your username without changing your email, or change your email without changing your username. They do not have to match.

Your email address is what USPS uses to send you notifications about packages, account alerts, and password reset links. Your username is only what you type in when you sign in. If you want to change the email address USPS has on file for you, that is a different setting — usually found in the same Settings area, under "Email" or "Contact Information."

Troubleshooting username changes that do not save

If you click "Save" or "Confirm" and the page does not change or shows an error, first check that your new username follows the rules: 6 to 20 characters, letters and numbers only, no spaces or special characters. If it does, try clearing your browser cache and signing in again. Sometimes old data cached on your computer can interfere with the change.

If the problem continues, try using a different web browser — for example, if you were using Chrome, try Firefox or Safari. If the change still will not save, contact USPS customer service through the "Contact Us" link on USPS.com. They can check whether there is a technical issue with your account or help you change your username through another method.

Frequently Asked Questions

Can I change my username back to what it was before?

Yes. Once you change your username, you can change it again at any time by going back to Settings and following the same steps. The old username becomes available for someone else to use, but you can reclaim it if you want to.

Will changing my username affect my packages or mail?

No. Your username is only for signing in to USPS.com. It does not affect your mailing address, package tracking, or any mail or packages already in the system. USPS tracks everything using your account ID, not your username.

Do I need to change my password when I change my username?

No. Your username and password are separate. You can change one without changing the other. However, if you want to change your password at the same time, you can do that in the same Settings area.

What if the username I want is already taken?

USPS will tell you when ready that the username is not available. Try a different combination of letters and numbers. You can add numbers to the end of your preferred name, or use a different spelling or variation.

Can I use special characters like underscores or hyphens in my username?

No. USPS usernames can only contain letters (A–Z, a–z) and numbers (0–9). Spaces, underscores, hyphens, periods, and other special characters are not allowed. If you try to use them, the site will show an error.