List All User Accounts on a Windows System via Command Line

For anyone who is here just looking for a way to list all users on your machine in the command line, and don't need a loop. Just run this command:

net user

And it will output what you need in this format

-------------------------------------
User1    User2    User3    User4
The command completed successfully.

If you want to iterate through users strictly in the Windows command line, the easiest way would be a combination of wmic and a for loop.

for /f "tokens=* skip=1" %%a in ('wmic UserAccount get Name') do (
    if not "%%a"=="" (
        :: %%a is a variable containing an account name
    )
)

The heart of the command is wmic UserAccount get Name, which should print out a list of accounts. You may wish to do some filtering, like Karan did in his VBScript answer, with something like wmic UserAccount where "LocalAccount=True" get Name. Any field is filterable; to view all of them, use wmic UserAccount get (omitting Name).

The for loop is simply used to parse the command output. It skips the first line (which prints the column heading), and the last line is skipped with the if command, since it is empty. See for /? for more information.