First of all to delete facebook page you must be an admin of this page. If you are admin then you can follow following steps to delete facebook page:
- click on “Settings” at top right of your page.
2. By clicking on settings, settings page will open. Under “General” settings, there is a link at bottom “Remove Page / Delete your Page”, Click on it.
3. When you’ll click on it, link’s text will change to “Permanently delete my Page”. Then, again click on it.
Delete Facebook Page Confirmation Box
4. A confirmation box will appear, having this wording; “Deleting a Page is permanent. Once you delete a Page, you will not be able to get it back. Are you sure you want to delete [Page Name ]?”
5. Just click on “Delete” button and you have done!
Source: How to delete a facebook page