The correct spelling is U-S-E-R-N-A-M-E, one word with no hyphen or space

Username is spelled as a single word: U-S-E-R-N-A-M-E. It is not "user name" (two words), "user-name" (hyphenated), or "username" written in all capitals unless the system you are using requires capitals. The word combines "user" and "name" into one compound word, the same way "password" and "email" are written.

When you see the word in a sentence, it looks like this: "Enter your username in the field." If a website or app asks you to create a username, that is the single word they mean — your personal login identifier.

Key Takeaways

  • Username is always one word with no space or hyphen between "user" and "name".
  • The word is lowercase unless it starts a sentence or appears in a title.
  • Common misspellings include "user name" (two words) and "user-name" (hyphenated), both of which are incorrect.
  • When typing your username into a login field, match the exact spelling and capitalization you chose when you created the account.

Why the spelling matters when you log in

Most systems treat usernames as case-sensitive, meaning that "JohnSmith" is different from "johnsmith" or "JOHNSMITH". If you created your account with capital letters in specific places, you must type it exactly that way to log in. If you spell it differently — even just changing one letter from uppercase to lowercase — the system will not recognize it as your account.

This is why it is important to remember not just the letters in your username, but also which ones are capitalized. Write down your username exactly as you created it and keep it somewhere safe, like a password manager or a locked notebook. That way you can copy and paste it or refer back to it if you forget the exact capitalization.

Common misspellings to avoid

The most frequent mistake is writing "user name" as two separate words. This happens because people think of it as "the name of the user," but the correct compound word is one word. You will see "user name" in some older documents or informal writing, but it is not the standard spelling in technology.

Another common error is adding a hyphen: "user-name". Hyphens appear in some compound words (like "mother-in-law"), but username does not use one. A hyphen in your username field will either be rejected by the system or treated as part of your actual username, which can cause login problems later.

All-caps spelling — "USERNAME" — is technically correct as a word, but most systems ask you to type your username in the exact case you chose. If you created your account as "username" in lowercase, typing "USERNAME" will not work.

How to find your username if you forgot it

If you cannot remember your username, look for a "Forgot username?" link on the login page. Most services will ask for your email address and send you a message with your username or a link to reset it. Some will display your username directly on the screen after you verify your email.

Check your email inbox and spam folder for messages from the service. Companies often send your username in a welcome email when you first create an account, or in password reset emails. If you still cannot find it, contact the service's support team with proof of your identity — they can look up your account and tell you what username is associated with it.

Usernames versus passwords and other login details

Your username is not the same as your password. A username is your public identifier on a system — it is often visible to other users or in your account settings. A password is secret and should never be shared. Some systems also use email addresses instead of usernames for login, though many ask for both.

When a system asks you to "enter your username," it is asking for the login name you created, not your real name, email, or password. If you are unsure which field is which, look for the label above or beside each box. It will say "Username," "Email," "Password," or something similar.

Spelling your username in different contexts

When you type your username into a login field, use the exact spelling and capitalization you chose. When you write about your username in an email or message to someone else, spell it the same way so they can copy it correctly if needed. If you are telling someone your username out loud, say each letter clearly: "That is J-O-H-N-S-M-I-T-H" rather than just "johnsmith," so they hear the capitalization.

On social media or in online communities, your username appears exactly as you typed it when you created your account. If you want to change how it looks, you usually have to create a new account or contact support to see if the platform allows username changes.

Frequently Asked Questions

Is it "username" or "user name"?

It is "username" — one word with no space. "User name" (two words) is a common mistake but not the correct spelling in technology contexts.

Does capitalization matter when I type my username?

Yes, in most systems. If you created your account as "JohnSmith," you must type it with those exact capital letters to log in. "johnsmith" or "JOHNSMITH" will not work.

Can my username have a hyphen in it?

Some systems allow hyphens in usernames, but the word "username" itself does not have a hyphen. If you add a hyphen when creating your account (like "john-smith"), that becomes part of your actual username and you must type it that way every time you log in.

What should I do if I forgot my username?

Look for a "Forgot username?" link on the login page, or contact the service's support team. Most companies can send your username to your email address or display it after you verify your identity.

Is my username the same as my password?

No. Your username is your login identifier and is often visible to others. Your password is secret and should never be shared. Some systems use your email address instead of a username, but they are still separate from your password.