Where to find your administrator username on each operating system

Your administrator username is the account name you use to log in with full system permissions. On Windows, you can find it by opening Settings, going to Accounts, and looking at the account name listed under "Your info" — that is your username. On a Mac, open System Preferences, click Users & Groups, and look for the account marked with a house icon; the short name shown below the full name is your administrator username. On Linux, open a terminal and type whoami to see your current username, or sudo cat /etc/sudoers to see which accounts have administrator rights.

If you are not sure which account is the administrator account, look for the one that has a lock icon next to it (on Mac) or is labeled "Administrator" in the account type field (on Windows). The administrator account is the one with permission to install software, change system settings, and create or delete other user accounts.

Key Takeaways

  • On Windows, your administrator username appears in Settings under Accounts > Your info.
  • On Mac, the administrator account shows a house icon in System Preferences under Users & Groups, and the short name is your username.
  • On Linux, typing whoami in the terminal shows your current username, or sudo cat /etc/sudoers shows all accounts with administrator rights.
  • Administrator accounts are marked with special indicators — a lock icon on Mac, "Administrator" label on Windows, or sudo access on Linux.
  • If you cannot find the administrator account, restart your computer and hold down the appropriate key during startup to access recovery mode or BIOS settings.

Finding the administrator username on Windows 10 and 11

Open the Settings app by pressing the Windows key and typing "Settings," then click on Accounts. On the left side, select "Your info." The name shown at the top of the page is your username. If you see "Administrator" listed as the account type below your name, this is an administrator account.

If you need to see all administrator accounts on your computer, go to Settings > Accounts > Other people. Look through the list for any account marked as "Administrator" in the account type field. You can also right-click on "This PC" or "My Computer" on your desktop, select Properties, then look for "Computer name" and "Workgroup" — this does not show the username directly, but you can then go back to Settings to match the account name.

Finding the administrator username on macOS

Click the Apple menu in the top-left corner and select System Preferences (or System Settings on newer Macs). Click Users & Groups. You will see a list of accounts on the left side. The account with a house icon next to it is the administrator account. Below the full name, you will see a shorter name in parentheses — this is your administrator username.

If the Users & Groups pane is locked (you will see a lock icon at the bottom), click it and enter your password to unlock it. Once unlocked, you can see all account details. If you have multiple administrator accounts, each one with a house icon is an administrator account, and each has its own short name username.

Finding the administrator username on Linux

Open a terminal window. Type whoami and press Enter. The output is your current username. If you are logged in as the root user or a user with administrator (sudo) rights, this will show that username.

To see all accounts that have administrator rights on your system, type sudo cat /etc/sudoers and press Enter. You will be asked for your password. The output will show which usernames have sudo access. Look for lines that do not start with a hash symbol (#) — these are active administrator permissions. On most Linux systems, the root account is the primary administrator, and any account listed in the sudoers file has administrator rights.

What to do if you cannot find or remember the administrator username

If you are locked out or cannot find the administrator account, you have a few options. On Windows, restart your computer and hold down the Shift key while clicking the power button to shut down. Then turn it back on and press F11 or F12 repeatedly (the key varies by manufacturer) to enter recovery mode. From there, you may be able to reset the password or access a hidden administrator account.

On Mac, restart and hold Command + R to enter Recovery Mode. Click Utilities > Terminal and type resetpassword to open the password reset tool. This will show you the administrator account name and let you reset its password. On Linux, restart and add init=/bin/bash to the kernel boot parameters (this varies by distribution) to enter single-user mode, where you can reset the root password or view the sudoers file.

Why you might need your administrator username

You need your administrator username when installing software, changing system settings, creating new user accounts, or accessing files that require elevated permissions. Many programs ask for administrator credentials before they run — this is a security feature that prevents unauthorized changes to your system. Knowing your administrator username makes it faster to grant permission when prompted.

If you are setting up a new computer or troubleshooting a problem, you may also need the administrator username to log in remotely or to give technical support staff permission to help you. Keeping this information in a safe place (such as a password manager) can save time if you need it later.

Frequently Asked Questions

Can I have more than one administrator account?

Yes. Most computers allow multiple administrator accounts. Each one has the same full permissions, but each has its own username and password. You can see all of them in Settings (Windows), Users & Groups (Mac), or the sudoers file (Linux).

Is the administrator username the same as the password?

No. The username is the account name you see when you log in. The password is separate and is what you type to prove you own that account. You need both to log in as an administrator.

What if I see "Guest" or "Standard User" instead of "Administrator"?

Guest and Standard User accounts have limited permissions and cannot install software or change system settings. You need to log in with an Administrator account to do those things. If you only have a Standard User account, you will need the administrator username and password when prompted.

Can I change my administrator username?

Yes, but the process is different on each system. On Windows and Mac, you can change it in Accounts settings, though some systems require you to create a new administrator account instead. On Linux, you rename the account in the terminal using the usermod command. Changing the username can affect file permissions and program settings, so do this carefully.

What should I do if I forgot my administrator password?

You will need to use recovery mode or a password reset tool. On Windows, use recovery mode (Shift + power button). On Mac, use Recovery Mode (Command + R) and the resetpassword tool. On Linux, boot into single-user mode. These methods let you reset the password without knowing the old one, but they require physical access to the computer.