Find Security Identifier (SID) of User in Windows
Every user account in Windows has a unique identity that the operating system uses to recognize it. While you may know your account by its username, Windows actually relies on something called a Security Identifier (SID) to manage permissions, security settings, user profiles, and access to files and folders. This unique value remains associated with your account and helps Windows distinguish it from every other user on the computer.
Knowing how to find your Security Identifier (SID) can be useful in many situations. For example, you may need it when editing the Windows Registry, troubleshooting user profile problems, restoring permissions, managing local accounts, or following advanced Windows administration guides. Although the SID may look like a long string of numbers, finding it is easier than most people expect.
This guide explains what a Security Identifier (SID) is, why it matters, and how you can find the SID of any user account in Windows 11 and Windows 10.
What is a Security Identifier (SID)?
A Security Identifier (SID) is a unique identification number that Windows automatically assigns to every user account, group, and security principal created on a computer. Instead of relying on usernames, Windows uses the SID internally to identify accounts and determine what they are allowed to access.
A SID usually begins with S-1-5 followed by several sets of numbers. For example, a user SID might look similar to:
S-1-5-21-3623811015-3361044348-30300820-1001
Even if you rename your Windows account, its SID generally remains the same because Windows identifies the account by the SID rather than the display name.
You may need to know a user’s SID when troubleshooting profile issues, locating user profile registry entries, checking permissions, working with command-line tools, or performing advanced administrative tasks. Fortunately, Windows includes several ways to view this information without installing additional software.
Find Security Identifier (SID) of User in Windows [Complete Guide]
Windows offers multiple methods to locate a user’s SID. Some methods are ideal for beginners, while others are preferred by IT professionals and system administrators. The good news is that none of these methods modify your system. They simply display the SID assigned to each account.
Below are the easiest methods to find the Security Identifier (SID) in Windows.
Step 1: Find the SID Using Command Prompt
The Command Prompt provides one of the quickest and easiest ways to display the SID of your current user account or every account on your computer.
Start by clicking the Start button and typing Command Prompt into the search box. When it appears in the results, select it. You can also choose Run as administrator, although viewing SIDs generally works without administrator privileges.
Once the Command Prompt window opens, type the following command and press Enter:
whoami /user
Windows immediately displays your current username along with its corresponding SID. The long value beginning with S-1-5 is your account’s Security Identifier.
If you want to view the SID for every local user account on your computer, type the following command instead:
wmic useraccount get name,sid
After pressing Enter, Windows displays a table containing usernames and their associated SIDs. This method is especially useful if multiple people use the same computer.
Take a moment to compare the usernames with the displayed SIDs. Since every SID is unique, you can easily identify which identifier belongs to which account.
Step 2: Find the SID Using Windows PowerShell
Windows PowerShell is another reliable method for finding user SIDs. It provides more flexibility and is commonly used for system management.
Open the Start menu and search for PowerShell. Click Windows PowerShell or PowerShell from the search results.
When the PowerShell window opens, type the following command:
Get-LocalUser | Select Name,SID
Press Enter.
PowerShell displays a list of all local user accounts together with their Security Identifiers. The output is organized into columns, making it easy to identify each account.
If your computer has several local accounts, this method provides a clean and readable view. Because PowerShell is a modern administrative tool, many advanced Windows guides recommend using it instead of older command-line utilities.
After identifying the correct account, you can copy the SID if you need it for registry editing or troubleshooting.
Step 3: Find the SID Using the Windows Registry
If you’re troubleshooting user profiles or following an advanced Windows repair guide, you may need to locate a SID within the Windows Registry.
Begin by pressing Windows + R to open the Run dialog box.
Type regedit and press Enter.
If prompted by User Account Control, select Yes.
When the Registry Editor opens, navigate to the following location:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
Inside the ProfileList folder, you’ll notice several folders whose names begin with S-1-5. Each folder represents the SID of a user account on your computer.
Click each SID folder individually and look at the ProfileImagePath entry in the right pane. This value shows the location of the user profile, such as:
C:\Users\John
Once you find the profile path matching the desired username, you’ve identified the correct SID.
Be careful when using the Registry Editor. Simply viewing information is safe, but changing registry values without understanding their purpose may affect Windows operation.
Step 4: Find the SID Using Local User Information
If you’re working on a shared computer, you may want to verify user accounts before checking their SIDs.
Press Windows + R, type netplwiz, and press Enter.
The User Accounts window displays all local user accounts configured on the computer. While this tool doesn’t directly display SIDs, it helps you confirm the exact username associated with each account.
Once you’ve identified the correct username, return to either Command Prompt or PowerShell to display its corresponding SID.
This approach helps avoid confusion when several accounts have similar names.
Step 5: Verify the SID for a Specific User
Sometimes you only need the SID for one particular user instead of viewing every account.
Open Command Prompt and type:
wmic useraccount where name=”Username” get sid
Replace Username with the actual account name.
For example:
wmic useraccount where name=”David” get sid
Press Enter.
Windows returns only the SID for that specific account, making it easier to copy and use in administrative tasks.
If you’re unsure about the exact username, you can first list all users using the earlier command before searching for an individual account.
FAQs
Is a SID different from my Windows username?
Yes. Your username is the name you see when signing in, while the Security Identifier (SID) is the unique identifier Windows uses internally to recognize your account.
Does changing my username change my SID?
No. Renaming your account changes only the display name. The SID remains the same because Windows continues to recognize the account by its unique identifier.
Can two users have the same SID?
No. Every user account receives its own unique SID. Windows uses these identifiers to distinguish one account from another.
Why do I need to know my SID?
You may need your SID when editing the Windows Registry, repairing user profiles, restoring permissions, managing user accounts, or following advanced troubleshooting instructions.
Is it safe to view my SID?
Yes. Viewing your SID is completely safe. It is simply information about your account. Problems generally occur only if you make unnecessary changes to system settings or the registry.
Can I change my SID?
Windows does not provide a supported way to manually change the SID of an existing user account. Since the SID is fundamental to how Windows identifies accounts, modifying it is not recommended.
Summary
Finding the Security Identifier (SID) of a user in Windows 11 or Windows 10 is a straightforward process once you know where to look. Whether you use Command Prompt, Windows PowerShell, or the Registry Editor, Windows provides several reliable ways to locate the unique identifier assigned to each account.
For most users, Command Prompt offers the fastest solution by displaying the SID in just a few seconds. PowerShell provides a modern and organized alternative, while the Registry Editor is especially useful when troubleshooting profile-related issues.