How to Disable WordPress Admin Bar for All Users Except Administrators

WordPress allows each user to disable the admin bar by simply editing their user profile.
As a site owner, you can also edit other user’s profiles and disable the admin bar for them.
If you want to disable the admin bar for any particular user in WordPress, you’ll need to edit their user profile.
Simply go to the Users » All Users page and then click on the ‘edit’ link for any user you want to disable the admin bar for.
This will bring you to the user profile editor page. From here, uncheck the box next to the ‘Show toolbar when viewing site’ option.
Scroll down and click the ‘Update User’ button to save your changes.