It is good practice to delete all themes that your site is not using. This avoids bloat in the filesystem as well as reducing the number of vectors of attack hackers could use.
Delete a WordPress Theme
Navigate to Appearence > Themes
This Theme Selector will show you all themes currently installed on your website. The active theme will be marked as Active (in the example shown you can see that Divi is the active theme)
Delete a Theme
To delete a theme, simply click on it within the Theme Selector and click the Delete link which is located to the bottom right of the popup window. You will be asked to confirm this, as which point the theme will be deleted from your system. We recommend you backup first. Note, you are not able to delete the active theme
Article published 16th August 2022
Last modified 02nd November 2023