Facebook page IDs are permanent identifiers assigned when you create a page and cannot be directly changed through Facebook's standard settings. However, you can customize how your page appears to users by changing your page's username (also called vanity URL), which is the human-readable web address like facebook.com/yourpagename. To change your username, go to your page settings, select "Page Info," and look for the "Username" field. You can modify this once every 30 days, provided the new username is available and meets Facebook's requirements (at least 5 characters, alphanumeric). The underlying page ID remains fixed behind the scenes. If you absolutely need a different page ID, the only option is to create an entirely new page, though this means losing your follower history, posts, and page history. For most purposes, updating your username is sufficient for rebranding. If you're trying to transfer a page or merge pages, Facebook offers limited tools for business consolidation—contact Meta Business Support for guidance on complex scenarios. Keep in mind that changing your username affects the page's web address and how people find it, but doesn't alter the unique numerical ID that Facebook uses internally to track the page.